diff --git a/Content.Client/Administration/UI/Tabs/AdminbusTab/AdminbusTab.xaml b/Content.Client/Administration/UI/Tabs/AdminbusTab/AdminbusTab.xaml
index 3fc51089d7..8822e5d60e 100644
--- a/Content.Client/Administration/UI/Tabs/AdminbusTab/AdminbusTab.xaml
+++ b/Content.Client/Administration/UI/Tabs/AdminbusTab/AdminbusTab.xaml
@@ -8,6 +8,7 @@
     <GridContainer Columns="3">
         <Button Name="SpawnEntitiesButton" Text="{Loc 'sandbox-window-spawn-entities-button'}" />
         <Button Name="SpawnTilesButton" Text="{Loc 'sandbox-window-spawn-tiles-button'} " />
+        <Button Name="SpawnDecalsButton" Text="{Loc 'sandbox-window-spawn-decals-button'}" />
         <Button Name="LoadGamePrototypeButton" Text="{Loc 'load-game-prototype'}"/>
         <cc:CommandButton Command="deleteewc Singularity" Name="DeleteSingulos" Text="{Loc 'delete-singularities'}"/>
         <cc:UICommandButton Command="events" Text="{Loc 'open-station-events'}" WindowType="{x:Type abt:StationEventsWindow}" />
diff --git a/Content.Client/Administration/UI/Tabs/AdminbusTab/AdminbusTab.xaml.cs b/Content.Client/Administration/UI/Tabs/AdminbusTab/AdminbusTab.xaml.cs
index 9b70624d54..6bf45c0c1b 100644
--- a/Content.Client/Administration/UI/Tabs/AdminbusTab/AdminbusTab.xaml.cs
+++ b/Content.Client/Administration/UI/Tabs/AdminbusTab/AdminbusTab.xaml.cs
@@ -1,5 +1,6 @@
 using System.IO;
 using Content.Client.Administration.Managers;
+using Content.Client.Decals.UI;
 using Content.Shared.Administration;
 using Robust.Client.AutoGenerated;
 using Robust.Client.Placement;
@@ -16,10 +17,11 @@ using Robust.Shared.Prototypes;
 namespace Content.Client.Administration.UI.Tabs.AdminbusTab
 {
     [GenerateTypedNameReferences]
-    public partial class AdminbusTab : Control
+    public sealed partial class AdminbusTab : Control
     {
         private EntitySpawnWindow? _entitySpawnWindow;
         private TileSpawnWindow? _tileSpawnWindow;
+        private DecalPlacerWindow? _decalPlacerWindow;
 
         public AdminbusTab()
         {
@@ -29,6 +31,7 @@ namespace Content.Client.Administration.UI.Tabs.AdminbusTab
             // TODO: This will probably need some command check at some point
             SpawnEntitiesButton.OnPressed += SpawnEntitiesButtonOnOnPressed;
             SpawnTilesButton.OnPressed += SpawnTilesButtonOnOnPressed;
+            SpawnDecalsButton.OnPressed += SpawnDecalsButtonOnPressed;
             LoadGamePrototypeButton.OnPressed += LoadGamePrototypeButtonOnOnPressed;
             LoadGamePrototypeButton.Visible = IoCManager.Resolve<IClientAdminManager>().HasFlag(AdminFlags.Query);
         }
@@ -73,5 +76,15 @@ namespace Content.Client.Administration.UI.Tabs.AdminbusTab
 
             EntitySystem.Get<AdminSystem>().OpenCommand(_tileSpawnWindow);
         }
+
+        private void SpawnDecalsButtonOnPressed(BaseButton.ButtonEventArgs obj)
+        {
+            if (_decalPlacerWindow == null || _decalPlacerWindow.Disposed)
+            {
+                _decalPlacerWindow = new DecalPlacerWindow(IoCManager.Resolve<IPrototypeManager>());
+            }
+
+            EntitySystem.Get<AdminSystem>().OpenCommand(_decalPlacerWindow);
+        }
     }
 }
diff --git a/Content.Client/Decals/DecalPlacementSystem.cs b/Content.Client/Decals/DecalPlacementSystem.cs
new file mode 100644
index 0000000000..ec04709fd0
--- /dev/null
+++ b/Content.Client/Decals/DecalPlacementSystem.cs
@@ -0,0 +1,112 @@
+using Content.Shared.Decals;
+using Robust.Client.GameObjects;
+using Robust.Client.Input;
+using Robust.Shared.Input;
+using Robust.Shared.Input.Binding;
+
+namespace Content.Client.Decals;
+
+// This is shit and basically a half-rewrite of PlacementManager
+// TODO refactor placementmanager so this isnt shit anymore
+public sealed class DecalPlacementSystem : EntitySystem
+{
+    [Dependency] private readonly IInputManager _inputManager = default!;
+    [Dependency] private readonly InputSystem _inputSystem = default!;
+
+    private string? _decalId;
+    private Color _decalColor = Color.White;
+    private Angle _decalAngle = Angle.Zero;
+    private bool _snap;
+    private int _zIndex;
+    private bool _cleanable;
+
+    private bool _active;
+    private bool _placing;
+    private bool _erasing;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        CommandBinds.Builder.Bind(EngineKeyFunctions.EditorPlaceObject, new PointerStateInputCmdHandler(
+            (session, coords, uid) =>
+            {
+                if (!_active || _placing || _decalId == null)
+                    return false;
+
+                _placing = true;
+
+                if (_snap)
+                {
+                    var newPos = new Vector2(
+                        (float) (MathF.Round(coords.X - 0.5f, MidpointRounding.AwayFromZero) + 0.5),
+                        (float) (MathF.Round(coords.Y - 0.5f, MidpointRounding.AwayFromZero) + 0.5)
+                    );
+                    coords = coords.WithPosition(newPos);
+                }
+
+                coords = coords.Offset(new Vector2(-0.5f, -0.5f));
+
+                if (!coords.IsValid(EntityManager))
+                    return false;
+
+                var decal = new Decal(coords.Position, _decalId, _decalColor, _decalAngle, _zIndex, _cleanable);
+                RaiseNetworkEvent(new RequestDecalPlacementEvent(decal, coords));
+
+                return true;
+            },
+            (session, coords, uid) =>
+            {
+                if (!_active)
+                    return false;
+
+                _placing = false;
+                return true;
+            }, true))
+            .Bind(EngineKeyFunctions.EditorCancelPlace, new PointerStateInputCmdHandler(
+            (session, coords, uid) =>
+            {
+                if (!_active || _erasing)
+                    return false;
+
+                _erasing = true;
+
+                RaiseNetworkEvent(new RequestDecalRemovalEvent(coords));
+
+                return true;
+            }, (session, coords, uid) =>
+            {
+                if (!_active)
+                    return false;
+                _erasing = false;
+
+                return true;
+            }, true)).Register<DecalPlacementSystem>();
+    }
+
+    public override void Shutdown()
+    {
+        base.Shutdown();
+
+        CommandBinds.Unregister<DecalPlacementSystem>();
+    }
+
+    public void UpdateDecalInfo(string id, Color color, float rotation, bool snap, int zIndex, bool cleanable)
+    {
+        _decalId = id;
+        _decalColor = color;
+        _decalAngle = Angle.FromDegrees(rotation);
+        _snap = snap;
+        _zIndex = zIndex;
+        _cleanable = cleanable;
+    }
+
+    public void SetActive(bool active)
+    {
+        _active = active;
+        if (_active)
+            _inputManager.Contexts.SetActiveContext("editor");
+        else
+            _inputSystem.SetEntityContextActive();
+    }
+}
diff --git a/Content.Client/Decals/UI/AlphaColorPicker.cs b/Content.Client/Decals/UI/AlphaColorPicker.cs
new file mode 100644
index 0000000000..5777809bba
--- /dev/null
+++ b/Content.Client/Decals/UI/AlphaColorPicker.cs
@@ -0,0 +1,98 @@
+using System.Linq;
+using Content.Client.CharacterAppearance;
+using Content.Client.Stylesheets;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controls;
+
+namespace Content.Client.Decals.UI;
+
+/// <summary>
+///     This is just copied from EyeColorPicker btw. I might make it more generic
+/// </summary>
+public sealed class AlphaColorPicker : Control
+{
+    public event Action<Color>? OnColorPicked;
+
+    private readonly ColorSlider _colorSliderR;
+    private readonly ColorSlider _colorSliderG;
+    private readonly ColorSlider _colorSliderB;
+    private readonly ColorSlider _colorSliderA;
+    private PaletteColorPicker? _picker;
+
+    private Color _lastColor;
+
+    public void SetData(Color color)
+    {
+        _lastColor = color;
+
+        _colorSliderR.ColorValue = color.RByte;
+        _colorSliderG.ColorValue = color.GByte;
+        _colorSliderB.ColorValue = color.BByte;
+        _colorSliderA.ColorValue = color.AByte;
+    }
+
+    public AlphaColorPicker()
+    {
+        Button pickerOpen;
+        var vBox = new BoxContainer
+        {
+            Orientation = BoxContainer.LayoutOrientation.Vertical
+        };
+        AddChild(vBox);
+
+        vBox.AddChild(_colorSliderR = new ColorSlider(StyleNano.StyleClassSliderRed));
+        vBox.AddChild(_colorSliderG = new ColorSlider(StyleNano.StyleClassSliderGreen));
+        vBox.AddChild(_colorSliderB = new ColorSlider(StyleNano.StyleClassSliderBlue));
+        vBox.AddChild(_colorSliderA = new ColorSlider(StyleNano.StyleClassSliderWhite));
+        vBox.AddChild(pickerOpen = new Button
+        {
+            Text = "Palette"
+        });
+
+        pickerOpen.OnPressed += _ =>
+        {
+            if (_picker is null)
+            {
+                _picker = new PaletteColorPicker();
+                _picker.OpenToLeft();
+                _picker.PaletteList.OnItemSelected += args =>
+                {
+                    SetData((args.ItemList.GetSelected().First().Metadata as Color?)!.Value);
+                    ColorValueChanged();
+                };
+            }
+            else
+            {
+                if (_picker.IsOpen)
+                {
+                    _picker.Close();
+                }
+                else
+                {
+                    _picker.Open();
+                }
+            }
+        };
+
+
+        var colorValueChanged = ColorValueChanged;
+        _colorSliderR.OnValueChanged += colorValueChanged;
+        _colorSliderG.OnValueChanged += colorValueChanged;
+        _colorSliderB.OnValueChanged += colorValueChanged;
+        _colorSliderA.OnValueChanged += colorValueChanged;
+    }
+
+    private void ColorValueChanged()
+    {
+        var newColor = new Color(
+            _colorSliderR.ColorValue,
+            _colorSliderG.ColorValue,
+            _colorSliderB.ColorValue,
+            _colorSliderA.ColorValue
+        );
+
+        OnColorPicked?.Invoke(newColor);
+
+        _lastColor = newColor;
+    }
+}
diff --git a/Content.Client/Decals/UI/DecalPlacerWindow.xaml b/Content.Client/Decals/UI/DecalPlacerWindow.xaml
new file mode 100644
index 0000000000..fc86ba8841
--- /dev/null
+++ b/Content.Client/Decals/UI/DecalPlacerWindow.xaml
@@ -0,0 +1,26 @@
+<DefaultWindow xmlns="https://spacestation14.io"
+               xmlns:ui="clr-namespace:Content.Client.Decals.UI"
+               Title="{Loc 'decal-placer-window-title'}"
+               MinSize="250 500"
+               SetSize="250 500">
+    <BoxContainer Orientation="Vertical">
+        <LineEdit Name="Search" />
+        <ScrollContainer VerticalExpand="True">
+            <GridContainer Name="Grid" Columns="6">
+                <!-- Decals get added here by code -->
+            </GridContainer>
+        </ScrollContainer>
+
+        <ui:AlphaColorPicker Name="ColorPicker"/>
+        <CheckBox Name="EnableColor" Text="{Loc 'decal-placer-window-use-color'}" />
+        <CheckBox Name="EnableSnap" Text="{Loc 'decal-placer-window-enable-snap'}" />
+        <CheckBox Name="EnableCleanable" Text="{Loc 'decal-placer-window-enable-cleanable'}" />
+        <BoxContainer Name="SpinBoxContainer" Orientation="Horizontal">
+            <Label Text="{Loc 'decal-placer-window-rotation'}" Margin="0 0 0 1" />
+        </BoxContainer>
+        <BoxContainer Orientation="Horizontal">
+            <Label Text="{Loc 'decal-placer-window-zindex'}" Margin="0 0 0 1" />
+            <SpinBox Name="ZIndexSpinBox" HorizontalExpand ="True" />
+        </BoxContainer>
+    </BoxContainer>
+</DefaultWindow>
diff --git a/Content.Client/Decals/UI/DecalPlacerWindow.xaml.cs b/Content.Client/Decals/UI/DecalPlacerWindow.xaml.cs
new file mode 100644
index 0000000000..0acf6145f4
--- /dev/null
+++ b/Content.Client/Decals/UI/DecalPlacerWindow.xaml.cs
@@ -0,0 +1,167 @@
+using Content.Client.Stylesheets;
+using Content.Shared.Decals;
+using Robust.Client.AutoGenerated;
+using Robust.Client.Graphics;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.CustomControls;
+using Robust.Client.UserInterface.XAML;
+using Robust.Client.Utility;
+using Robust.Shared.Prototypes;
+using static Robust.Client.UserInterface.Controls.BaseButton;
+
+namespace Content.Client.Decals.UI;
+
+[GenerateTypedNameReferences]
+public sealed partial class DecalPlacerWindow : DefaultWindow
+{
+    private readonly IPrototypeManager _prototypeManager;
+    private readonly DecalPlacementSystem _decalPlacementSystem;
+
+    public FloatSpinBox RotationSpinBox;
+
+    private Dictionary<string, Texture>? _decals;
+    private string? _selected;
+    private Color _color = Color.White;
+    private bool _useColor;
+    private bool _snap;
+    private float _rotation;
+    private bool _cleanable;
+    private int _zIndex;
+
+    public DecalPlacerWindow(IPrototypeManager prototypeManager)
+    {
+        RobustXamlLoader.Load(this);
+
+        _prototypeManager = prototypeManager;
+        _decalPlacementSystem = EntitySystem.Get<DecalPlacementSystem>();
+
+        // This needs to be done in C# so we can have custom stuff passed in the constructor
+        // and thus have a proper step size
+        RotationSpinBox = new FloatSpinBox(90.0f, 0)
+        {
+            HorizontalExpand = true
+        };
+        SpinBoxContainer.AddChild(RotationSpinBox);
+
+        Search.OnTextChanged += _ => RefreshList();
+        ColorPicker.OnColorPicked += color =>
+        {
+            _color = color;
+            UpdateDecalPlacementInfo();
+            RefreshList();
+        };
+        RotationSpinBox.OnValueChanged += args =>
+        {
+            _rotation = args.Value;
+            UpdateDecalPlacementInfo();
+        };
+        EnableColor.OnToggled += args =>
+        {
+            _useColor = args.Pressed;
+            UpdateDecalPlacementInfo();
+            RefreshList();
+        };
+        EnableSnap.OnToggled += args =>
+        {
+            _snap = args.Pressed;
+            UpdateDecalPlacementInfo();
+        };
+        EnableCleanable.OnToggled += args =>
+        {
+            _cleanable = args.Pressed;
+            UpdateDecalPlacementInfo();
+        };
+        // i have to make this a member method for some reason and i have no idea why its only for spinboxes
+        ZIndexSpinBox.ValueChanged += ZIndexSpinboxChanged;
+
+        Populate();
+    }
+
+    private void UpdateDecalPlacementInfo()
+    {
+        if (_selected is null)
+            return;
+
+        var color = _useColor ? _color : Color.White;
+        _decalPlacementSystem.UpdateDecalInfo(_selected, color, _rotation, _snap, _zIndex, _cleanable);
+    }
+
+    private void RefreshList()
+    {
+        // Clear
+        Grid.RemoveAllChildren();
+        if (_decals == null) return;
+
+        var filter = Search.Text;
+        foreach (var (decal, tex) in _decals)
+        {
+            if (!decal.ToLowerInvariant().Contains(filter.ToLowerInvariant()))
+                continue;
+
+            var button = new TextureButton
+            {
+                TextureNormal = tex,
+                Name = decal,
+                ToolTip = decal,
+                Modulate = _useColor ? _color : Color.White
+            };
+            button.OnPressed += ButtonOnPressed;
+            if (_selected == decal)
+            {
+                var panelContainer = new PanelContainer
+                {
+                    PanelOverride = new StyleBoxFlat
+                    {
+                        BackgroundColor = StyleNano.ButtonColorDefault
+                    },
+                    Children =
+                    {
+                        button
+                    }
+                };
+                Grid.AddChild(panelContainer);
+            }
+            else
+                Grid.AddChild(button);
+        }
+    }
+
+    private void ZIndexSpinboxChanged(object? sender, ValueChangedEventArgs e)
+    {
+        _zIndex = e.Value;
+        UpdateDecalPlacementInfo();
+    }
+
+    private void ButtonOnPressed(ButtonEventArgs obj)
+    {
+        if (obj.Button.Name == null) return;
+
+        _selected = obj.Button.Name;
+        UpdateDecalPlacementInfo();
+        RefreshList();
+    }
+
+    public void Populate()
+    {
+        var prototypes = _prototypeManager.EnumeratePrototypes<DecalPrototype>();
+        _decals = new Dictionary<string, Texture>();
+        foreach (var decalPrototype in prototypes)
+        {
+            _decals.Add(decalPrototype.ID, decalPrototype.Sprite.Frame0());
+        }
+
+        RefreshList();
+    }
+
+    protected override void Opened()
+    {
+        base.Opened();
+        _decalPlacementSystem.SetActive(true);
+    }
+
+    public override void Close()
+    {
+        base.Close();
+        _decalPlacementSystem.SetActive(false);
+    }
+}
diff --git a/Content.Client/Decals/UI/PaletteColorPicker.xaml b/Content.Client/Decals/UI/PaletteColorPicker.xaml
new file mode 100644
index 0000000000..5cd90c927e
--- /dev/null
+++ b/Content.Client/Decals/UI/PaletteColorPicker.xaml
@@ -0,0 +1,12 @@
+<DefaultWindow xmlns="https://spacestation14.io"
+               Title="{Loc 'palette-color-picker-window-title'}"
+               MinSize="250 500"
+               SetSize="250 500">
+    <BoxContainer Orientation="Vertical">
+        <ItemList Name="PaletteList" VerticalExpand="True" Access="Public"/>
+        <BoxContainer Orientation="Horizontal">
+            <Label Text="Palette"/>
+            <OptionButton Name="Palettes"/>
+        </BoxContainer>
+    </BoxContainer>
+</DefaultWindow>
diff --git a/Content.Client/Decals/UI/PaletteColorPicker.xaml.cs b/Content.Client/Decals/UI/PaletteColorPicker.xaml.cs
new file mode 100644
index 0000000000..2d6a89101c
--- /dev/null
+++ b/Content.Client/Decals/UI/PaletteColorPicker.xaml.cs
@@ -0,0 +1,54 @@
+using Content.Shared.Decals;
+using Robust.Client.AutoGenerated;
+using Robust.Client.Graphics;
+using Robust.Client.ResourceManagement;
+using Robust.Client.UserInterface.CustomControls;
+using Robust.Client.UserInterface.XAML;
+using Robust.Shared.Prototypes;
+
+namespace Content.Client.Decals.UI;
+
+[GenerateTypedNameReferences]
+public sealed partial class PaletteColorPicker : DefaultWindow
+{
+    [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
+    [Dependency] private readonly IResourceCache _resourceCache = default!;
+
+    private readonly TextureResource _tex;
+
+    public PaletteColorPicker()
+    {
+        RobustXamlLoader.Load(this);
+        IoCManager.InjectDependencies(this);
+
+        _tex = _resourceCache.GetResource<TextureResource>("/Textures/Interface/Nano/button.svg.96dpi.png");
+
+        var i = 0;
+        foreach (var palette in _prototypeManager.EnumeratePrototypes<ColorPalettePrototype>())
+        {
+            Palettes.AddItem(palette.Name);
+            Palettes.SetItemMetadata(i, palette); // ew
+            i += 1;
+        }
+
+        Palettes.OnItemSelected += args =>
+        {
+            Palettes.SelectId(args.Id);
+            SetupList();
+        };
+
+        Palettes.Select(0);
+        SetupList();
+    }
+
+    private void SetupList()
+    {
+        PaletteList.Clear();
+        foreach (var (color, value) in (Palettes.SelectedMetadata as ColorPalettePrototype)!.Colors)
+        {
+            var item = PaletteList.AddItem(color, _tex.Texture);
+            item.Metadata = value;
+            item.IconModulate = value;
+        }
+    }
+}
diff --git a/Content.Client/EscapeMenu/UI/Tabs/KeyRebindTab.xaml.cs b/Content.Client/EscapeMenu/UI/Tabs/KeyRebindTab.xaml.cs
index 4269a84751..b600781174 100644
--- a/Content.Client/EscapeMenu/UI/Tabs/KeyRebindTab.xaml.cs
+++ b/Content.Client/EscapeMenu/UI/Tabs/KeyRebindTab.xaml.cs
@@ -145,6 +145,7 @@ namespace Content.Client.EscapeMenu.UI.Tabs
             AddButton(ContentKeyFunctions.OpenEntitySpawnWindow);
             AddButton(ContentKeyFunctions.OpenSandboxWindow);
             AddButton(ContentKeyFunctions.OpenTileSpawnWindow);
+            AddButton(ContentKeyFunctions.OpenDecalSpawnWindow);
             AddButton(ContentKeyFunctions.OpenAdminMenu);
 
             AddHeader("ui-options-header-misc");
diff --git a/Content.Client/Input/ContentContexts.cs b/Content.Client/Input/ContentContexts.cs
index d6680fefe4..c5d5d5b849 100644
--- a/Content.Client/Input/ContentContexts.cs
+++ b/Content.Client/Input/ContentContexts.cs
@@ -97,6 +97,7 @@ namespace Content.Client.Input
             common.AddFunction(ContentKeyFunctions.OpenEntitySpawnWindow);
             common.AddFunction(ContentKeyFunctions.OpenSandboxWindow);
             common.AddFunction(ContentKeyFunctions.OpenTileSpawnWindow);
+            common.AddFunction(ContentKeyFunctions.OpenDecalSpawnWindow);
             common.AddFunction(ContentKeyFunctions.OpenAdminMenu);
         }
     }
diff --git a/Content.Client/Sandbox/SandboxManager.cs b/Content.Client/Sandbox/SandboxManager.cs
index 002b26a6f7..b515fded6c 100644
--- a/Content.Client/Sandbox/SandboxManager.cs
+++ b/Content.Client/Sandbox/SandboxManager.cs
@@ -1,4 +1,5 @@
 using System;
+using Content.Client.Decals.UI;
 using Content.Client.HUD;
 using Content.Client.Markers;
 using Content.Shared.Input;
@@ -29,6 +30,7 @@ namespace Content.Client.Sandbox
         public readonly Button RespawnButton;
         public readonly Button SpawnEntitiesButton;
         public readonly Button SpawnTilesButton;
+        public readonly Button SpawnDecalsButton;
         public readonly Button GiveFullAccessButton;  //A button that just puts a captain's ID in your hands.
         public readonly Button GiveAghostButton;
         public readonly Button ToggleLightButton;
@@ -64,6 +66,9 @@ namespace Content.Client.Sandbox
             SpawnTilesButton = new Button { Text = Loc.GetString("sandbox-window-spawn-tiles-button") };
             vBox.AddChild(SpawnTilesButton);
 
+            SpawnDecalsButton = new Button { Text = Loc.GetString("sandbox-window-spawn-decals-button") };
+            vBox.AddChild(SpawnDecalsButton);
+
             GiveFullAccessButton = new Button { Text = Loc.GetString("sandbox-window-grant-full-access-button") };
             vBox.AddChild(GiveFullAccessButton);
 
@@ -128,6 +133,7 @@ namespace Content.Client.Sandbox
         private SandboxWindow? _window;
         private EntitySpawnWindow? _spawnWindow;
         private TileSpawnWindow? _tilesSpawnWindow;
+        private DecalPlacerWindow? _decalSpawnWindow;
         private bool _sandboxWindowToggled;
 
         public void Initialize()
@@ -150,6 +156,8 @@ namespace Content.Client.Sandbox
                 InputCmdHandler.FromDelegate(session => ToggleSandboxWindow()));
             _inputManager.SetInputCommand(ContentKeyFunctions.OpenTileSpawnWindow,
                 InputCmdHandler.FromDelegate(session => ToggleTilesWindow()));
+            _inputManager.SetInputCommand(ContentKeyFunctions.OpenDecalSpawnWindow,
+                InputCmdHandler.FromDelegate(session => ToggleDecalsWindow()));
         }
 
         private void SandboxButtonPressed(bool newValue)
@@ -205,6 +213,7 @@ namespace Content.Client.Sandbox
             _window.RespawnButton.OnPressed += OnRespawnButtonOnOnPressed;
             _window.SpawnTilesButton.OnPressed += OnSpawnTilesButtonClicked;
             _window.SpawnEntitiesButton.OnPressed += OnSpawnEntitiesButtonClicked;
+            _window.SpawnDecalsButton.OnPressed += OnSpawnDecalsButtonClicked;
             _window.GiveFullAccessButton.OnPressed += OnGiveAdminAccessButtonClicked;
             _window.GiveAghostButton.OnPressed += OnGiveAghostButtonClicked;
             _window.ToggleLightButton.OnToggled += OnToggleLightButtonClicked;
@@ -240,6 +249,11 @@ namespace Content.Client.Sandbox
             ToggleTilesWindow();
         }
 
+        private void OnSpawnDecalsButtonClicked(BaseButton.ButtonEventArgs obj)
+        {
+            ToggleDecalsWindow();
+        }
+
         private void OnToggleLightButtonClicked(BaseButton.ButtonEventArgs args)
         {
             ToggleLight();
@@ -327,6 +341,25 @@ namespace Content.Client.Sandbox
             }
         }
 
+        private void ToggleDecalsWindow()
+        {
+            if (_decalSpawnWindow == null)
+            {
+                _decalSpawnWindow = new DecalPlacerWindow(_prototypeManager);
+                _decalSpawnWindow.OpenToLeft();
+                return;
+            }
+
+            if (_decalSpawnWindow.IsOpen)
+            {
+                _decalSpawnWindow.Close();
+            }
+            else
+            {
+                _decalSpawnWindow.Open();
+            }
+        }
+
         private void ToggleLight()
         {
             _consoleHost.ExecuteCommand("togglelight");
diff --git a/Content.Client/Stylesheets/StyleNano.cs b/Content.Client/Stylesheets/StyleNano.cs
index 757cab829d..14986e3b5e 100644
--- a/Content.Client/Stylesheets/StyleNano.cs
+++ b/Content.Client/Stylesheets/StyleNano.cs
@@ -66,6 +66,7 @@ namespace Content.Client.Stylesheets
         public const string StyleClassSliderRed = "Red";
         public const string StyleClassSliderGreen = "Green";
         public const string StyleClassSliderBlue = "Blue";
+        public const string StyleClassSliderWhite = "White";
 
         public const string StyleClassLabelHeadingBigger = "LabelHeadingBigger";
         public const string StyleClassLabelKeyText = "LabelKeyText";
@@ -436,6 +437,7 @@ namespace Content.Client.Stylesheets
             var sliderFillGreen = new StyleBoxTexture(sliderFillBox) {Modulate = Color.LimeGreen};
             var sliderFillRed = new StyleBoxTexture(sliderFillBox) {Modulate = Color.Red};
             var sliderFillBlue = new StyleBoxTexture(sliderFillBox) {Modulate = Color.Blue};
+            var sliderFillWhite = new StyleBoxTexture(sliderFillBox) { Modulate = Color.White };
 
             var boxFont13 = resCache.GetFont("/Fonts/Boxfont-round/Boxfont Round.ttf", 13);
 
@@ -1155,6 +1157,11 @@ namespace Content.Client.Stylesheets
                     new StyleProperty(Slider.StylePropertyFill, sliderFillBlue),
                 }),
 
+                new StyleRule(new SelectorElement(typeof(Slider), new []{StyleClassSliderWhite}, null, null), new []
+                {
+                    new StyleProperty(Slider.StylePropertyFill, sliderFillWhite),
+                }),
+
                 // chat channel option selector
                 new StyleRule(new SelectorElement(typeof(Button), new[] {StyleClassChatChannelSelectorButton}, null, null), new[]
                 {
diff --git a/Content.Server/Decals/DecalSystem.cs b/Content.Server/Decals/DecalSystem.cs
index f7f4f9525c..629b7b1ded 100644
--- a/Content.Server/Decals/DecalSystem.cs
+++ b/Content.Server/Decals/DecalSystem.cs
@@ -1,21 +1,19 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
+using System.Diagnostics.CodeAnalysis;
+using Content.Server.Administration.Managers;
+using Content.Shared.Administration;
 using Content.Shared.Decals;
 using Content.Shared.Maps;
 using Robust.Server.Player;
 using Robust.Shared.Enums;
-using Robust.Shared.GameObjects;
-using Robust.Shared.IoC;
 using Robust.Shared.Map;
-using Robust.Shared.Maths;
 using Robust.Shared.Player;
 
 namespace Content.Server.Decals
 {
-    public class DecalSystem : SharedDecalSystem
+    public sealed class DecalSystem : SharedDecalSystem
     {
         [Dependency] private readonly IPlayerManager _playerManager = default!;
+        [Dependency] private readonly IAdminManager _adminManager = default!;
 
         private readonly Dictionary<GridId, HashSet<Vector2i>> _dirtyChunks = new();
         private readonly Dictionary<IPlayerSession, Dictionary<GridId, HashSet<Vector2i>>> _previousSentChunks = new();
@@ -26,6 +24,9 @@ namespace Content.Server.Decals
 
             _playerManager.PlayerStatusChanged += OnPlayerStatusChanged;
             MapManager.TileChanged += OnTileChanged;
+
+            SubscribeNetworkEvent<RequestDecalPlacementEvent>(OnDecalPlacementRequest);
+            SubscribeNetworkEvent<RequestDecalRemovalEvent>(OnDecalRemovalRequest);
         }
 
         public override void Shutdown()
@@ -79,6 +80,42 @@ namespace Content.Server.Decals
             }
         }
 
+        private void OnDecalPlacementRequest(RequestDecalPlacementEvent ev, EntitySessionEventArgs eventArgs)
+        {
+            if (eventArgs.SenderSession is not IPlayerSession session)
+                return;
+
+            // bad
+            if (!_adminManager.HasAdminFlag(session, AdminFlags.Mapping))
+                return;
+
+            if (!ev.Coordinates.IsValid(EntityManager))
+                return;
+
+            TryAddDecal(ev.Decal, ev.Coordinates, out _);
+        }
+
+        private void OnDecalRemovalRequest(RequestDecalRemovalEvent ev, EntitySessionEventArgs eventArgs)
+        {
+            if (eventArgs.SenderSession is not IPlayerSession session)
+                return;
+
+            // bad
+            if (!_adminManager.HasAdminFlag(session, AdminFlags.Mapping))
+                return;
+
+            if (!ev.Coordinates.IsValid(EntityManager))
+                return;
+
+            var gridId = ev.Coordinates.GetGridId(EntityManager);
+
+            // remove all decals on the same tile
+            foreach (var decal in GetDecalsInRange(gridId, ev.Coordinates.Position))
+            {
+                RemoveDecal(gridId, decal);
+            }
+        }
+
         protected override void DirtyChunk(GridId id, Vector2i chunkIndices)
         {
             if(!_dirtyChunks.ContainsKey(id))
@@ -89,15 +126,24 @@ namespace Content.Server.Decals
         public bool TryAddDecal(string id, EntityCoordinates coordinates, [NotNullWhen(true)] out uint? uid, Color? color = null, Angle? rotation = null, int zIndex = 0, bool cleanable = false)
         {
             uid = 0;
-            if (!PrototypeManager.HasIndex<DecalPrototype>(id))
+
+            rotation ??= Angle.Zero;
+            var decal = new Decal(coordinates.Position, id, color, rotation.Value, zIndex, cleanable);
+
+            return TryAddDecal(decal, coordinates, out uid);
+        }
+
+        public bool TryAddDecal(Decal decal, EntityCoordinates coordinates, [NotNull] out uint? uid)
+        {
+            uid = 0;
+
+            if (!PrototypeManager.HasIndex<DecalPrototype>(decal.Id))
                 return false;
 
             var gridId = coordinates.GetGridId(EntityManager);
             if (MapManager.GetGrid(gridId).GetTileRef(coordinates).IsSpace())
                 return false;
 
-            rotation ??= Angle.Zero;
-            var decal = new Decal(coordinates.Position, id, color, rotation.Value, zIndex, cleanable);
             var chunkCollection = DecalGridChunkCollection(gridId);
             uid = chunkCollection.NextUid++;
             var chunkIndices = GetChunkIndices(decal.Coordinates);
@@ -106,6 +152,7 @@ namespace Content.Server.Decals
             chunkCollection.ChunkCollection[chunkIndices][uid.Value] = decal;
             ChunkIndex[gridId][uid.Value] = chunkIndices;
             DirtyChunk(gridId, chunkIndices);
+
             return true;
         }
 
diff --git a/Content.Shared/Decals/ColorPalettePrototype.cs b/Content.Shared/Decals/ColorPalettePrototype.cs
new file mode 100644
index 0000000000..5698e0e077
--- /dev/null
+++ b/Content.Shared/Decals/ColorPalettePrototype.cs
@@ -0,0 +1,11 @@
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.Decals;
+
+[Prototype("palette")]
+public sealed class ColorPalettePrototype : IPrototype
+{
+    [DataField("id")] public string ID { get; } = null!;
+    [DataField("name")] public string Name { get; } = null!;
+    [DataField("colors")] public Dictionary<string, Color> Colors { get; } = null!;
+}
diff --git a/Content.Shared/Decals/SharedDecalSystem.cs b/Content.Shared/Decals/SharedDecalSystem.cs
index 2d2b65640e..916f2ea579 100644
--- a/Content.Shared/Decals/SharedDecalSystem.cs
+++ b/Content.Shared/Decals/SharedDecalSystem.cs
@@ -8,6 +8,7 @@ using Robust.Shared.IoC;
 using Robust.Shared.Map;
 using Robust.Shared.Maths;
 using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization;
 
 namespace Content.Shared.Decals
 {
@@ -150,4 +151,31 @@ namespace Content.Shared.Decals
             return _xIndex <= _chunkRT.X;
         }
     }
+
+    /// <summary>
+    ///     Sent by clients to request that a decal is placed on the server.
+    /// </summary>
+    [Serializable, NetSerializable]
+    public sealed class RequestDecalPlacementEvent : EntityEventArgs
+    {
+        public Decal Decal;
+        public EntityCoordinates Coordinates;
+
+        public RequestDecalPlacementEvent(Decal decal, EntityCoordinates coordinates)
+        {
+            Decal = decal;
+            Coordinates = coordinates;
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public sealed class RequestDecalRemovalEvent : EntityEventArgs
+    {
+        public EntityCoordinates Coordinates;
+
+        public RequestDecalRemovalEvent(EntityCoordinates coordinates)
+        {
+            Coordinates = coordinates;
+        }
+    }
 }
diff --git a/Content.Shared/Input/ContentKeyFunctions.cs b/Content.Shared/Input/ContentKeyFunctions.cs
index 1cbcd0457c..0192cdaff8 100644
--- a/Content.Shared/Input/ContentKeyFunctions.cs
+++ b/Content.Shared/Input/ContentKeyFunctions.cs
@@ -38,6 +38,7 @@ namespace Content.Shared.Input
         public static readonly BoundKeyFunction OpenEntitySpawnWindow = "OpenEntitySpawnWindow";
         public static readonly BoundKeyFunction OpenSandboxWindow = "OpenSandboxWindow";
         public static readonly BoundKeyFunction OpenTileSpawnWindow = "OpenTileSpawnWindow";
+        public static readonly BoundKeyFunction OpenDecalSpawnWindow = "OpenDecalSpawnWindow";
         public static readonly BoundKeyFunction OpenAdminMenu = "OpenAdminMenu";
         public static readonly BoundKeyFunction TakeScreenshot = "TakeScreenshot";
         public static readonly BoundKeyFunction TakeScreenshotNoUI = "TakeScreenshotNoUI";
diff --git a/Resources/Locale/en-US/decals/decal-window.ftl b/Resources/Locale/en-US/decals/decal-window.ftl
new file mode 100644
index 0000000000..eebe945402
--- /dev/null
+++ b/Resources/Locale/en-US/decals/decal-window.ftl
@@ -0,0 +1,7 @@
+decal-placer-window-title = Decal Placer
+decal-placer-window-use-color = Custom Color
+decal-placer-window-rotation = Rotation
+decal-placer-window-zindex = Draw Depth
+decal-placer-window-enable-snap = Snap To Tile
+decal-placer-window-enable-cleanable = Cleanable
+palette-color-picker-window-title = Palettes
diff --git a/Resources/Locale/en-US/escape-menu/ui/options-menu.ftl b/Resources/Locale/en-US/escape-menu/ui/options-menu.ftl
index 6114a5f2f8..4414ec14d5 100644
--- a/Resources/Locale/en-US/escape-menu/ui/options-menu.ftl
+++ b/Resources/Locale/en-US/escape-menu/ui/options-menu.ftl
@@ -112,6 +112,7 @@ ui-options-function-open-abilities-menu = Open action menu
 ui-options-function-open-entity-spawn-window = Open entity spawn menu
 ui-options-function-open-sandbox-window = Open sandbox menu
 ui-options-function-open-tile-spawn-window = Open tile spawn menu
+ui-options-function-open-decal-spawn-window = Open decal spawn menu
 ui-options-function-open-admin-menu = Open admin menu
 
 ui-options-function-take-screenshot = Take screenshot
diff --git a/Resources/Locale/en-US/sandbox/sandbox-manager.ftl b/Resources/Locale/en-US/sandbox/sandbox-manager.ftl
index 7f8c72d6f6..f6c9cea573 100644
--- a/Resources/Locale/en-US/sandbox/sandbox-manager.ftl
+++ b/Resources/Locale/en-US/sandbox/sandbox-manager.ftl
@@ -2,6 +2,7 @@ sandbox-window-title = Sandbox Panel
 sandbox-window-respawn-button = Respawn
 sandbox-window-spawn-entities-button = Spawn Entities
 sandbox-window-spawn-tiles-button = Spawn Tiles
+sandbox-window-spawn-decals-button = Spawn Decals
 sandbox-window-grant-full-access-button = Grant Full Access
 sandbox-window-ghost-button = Ghost
 sandbox-window-toggle-lights-button = Toggle Lights
@@ -11,4 +12,4 @@ sandbox-window-toggle-subfloor-button = Toggle Subfloor
 sandbox-window-toggle-suicide-button = Suicide
 sandbox-window-show-spawns-button = Shows Spawns
 sandbox-window-show-bb-button = Show BB
-sandbox-window-link-machines-button = Link machines
\ No newline at end of file
+sandbox-window-link-machines-button = Link machines
diff --git a/Resources/Prototypes/Decals/Overlays/grayscale.yml b/Resources/Prototypes/Decals/Overlays/grayscale.yml
new file mode 100644
index 0000000000..8d21eac5e8
--- /dev/null
+++ b/Resources/Prototypes/Decals/Overlays/grayscale.yml
@@ -0,0 +1,76 @@
+- type: decal
+  id: FullTileOverlayGreyscale
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: fulltile_overlay
+
+- type: decal
+  id: HalfTileOverlayGreyscale
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: halftile_overlay
+
+- type: decal
+  id: HalfTileOverlayGreyscale90
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: halftile_overlay_90
+
+- type: decal
+  id: HalfTileOverlayGreyscale180
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: halftile_overlay_180
+
+- type: decal
+  id: HalfTileOverlayGreyscale270
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: halftile_overlay_270
+
+- type: decal
+  id: QuarterTileOverlayGreyscale
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: quartertile_overlay
+
+- type: decal
+  id: QuarterTileOverlayGreyscale90
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: quartertile_overlay_90
+
+- type: decal
+  id: QuarterTileOverlayGreyscale180
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: quartertile_overlay_180
+
+- type: decal
+  id: QuarterTileOverlayGreyscale270
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: quartertile_overlay_270
+
+- type: decal
+  id: CheckerNESW
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: checkerNESW
+
+- type: decal
+  id: CheckerNWSE
+  tags: ["station", "overlay"]
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: checkerNWSE
diff --git a/Resources/Prototypes/Decals/dirty.yml b/Resources/Prototypes/Decals/dirty.yml
new file mode 100644
index 0000000000..d53242304c
--- /dev/null
+++ b/Resources/Prototypes/Decals/dirty.yml
@@ -0,0 +1,52 @@
+# If you spawn any of these, they should probably be made cleanable as well.
+
+- type: decal
+  id: Dirt
+  tags: ["station", "dirty"]
+  sprite:
+    sprite: Decals/dirty.rsi
+    state: dirt
+
+- type: decal
+  id: DirtLight
+  tags: ["station", "dirty"]
+  sprite:
+    sprite: Decals/dirty.rsi
+    state: dirtlight
+
+- type: decal
+  id: DirtMedium
+  tags: ["station", "dirty"]
+  sprite:
+    sprite: Decals/dirty.rsi
+    state: dirtmedium
+
+- type: decal
+  id: DirtHeavy
+  tags: ["station", "dirty"]
+  sprite:
+    sprite: Decals/dirty.rsi
+    state: dirtheavy
+
+- type: decal
+  id: Damaged
+  tags: ["station", "dirty"]
+  sprite:
+    sprite: Decals/dirty.rsi
+    state: damaged
+
+- type: decal
+  id: Remains
+  tags: ["station", "dirty"]
+  sprite:
+    sprite: Decals/dirty.rsi
+    state: remains
+
+- type: decal
+  id: Rust
+  tags: ["station", "dirty"]
+  sprite:
+    sprite: Decals/dirty.rsi
+    state: rust
+
+
diff --git a/Resources/Prototypes/Decals/markings.yml b/Resources/Prototypes/Decals/markings.yml
new file mode 100644
index 0000000000..63915c1dbc
--- /dev/null
+++ b/Resources/Prototypes/Decals/markings.yml
@@ -0,0 +1,237 @@
+- type: decal
+  id: Arrows
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: arrows
+
+- type: decal
+  id: ArrowsGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: arrows_greyscale
+
+- type: decal
+  id: Bot
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: bot
+
+- type: decal
+  id: BotGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: bot_greyscale
+
+- type: decal
+  id: BotLeft
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: bot_left
+
+- type: decal
+  id: BotLeftGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: bot_left_greyscale
+
+- type: decal
+  id: BotRight
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: bot_right
+
+- type: decal
+  id: BotRightGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: bot_right_greyscale
+
+- type: decal
+  id: Box
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: box
+
+- type: decal
+  id: BoxGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: box_greyscale
+
+- type: decal
+  id: Caution
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: caution
+
+- type: decal
+  id: CautionGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: caution_greyscale
+
+- type: decal
+  id: Delivery
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: delivery
+
+- type: decal
+  id: DeliveryGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: delivery_greyscale
+
+- type: decal
+  id: LoadingArea
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: loading_area
+
+- type: decal
+  id: LoadingAreaGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: loading_area_greyscale
+
+- type: decal
+  id: StandClear
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: standclear
+
+- type: decal
+  id: StandClearGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: standclear_greyscale
+
+- type: decal
+  id: WarnBox
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_box
+
+- type: decal
+  id: WarnBoxGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_box_greyscale
+
+- type: decal
+  id: WarnEnd
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_end
+
+- type: decal
+  id: WarnEndGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_end_greyscale
+
+- type: decal
+  id: WarnFull
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_full
+
+- type: decal
+  id: WarnFullGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_full_greyscale
+
+- type: decal
+  id: WarningLine
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warningline
+
+- type: decal
+  id: WarningLineGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warningline_greyscale
+
+- type: decal
+  id: WarningLineCorner
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warninglinecorner
+
+- type: decal
+  id: WarningLineCornerGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warninglinecorner_greyscale
+
+- type: decal
+  id: WarningLineCornerFlipped
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warninglinecorner_flipped
+
+- type: decal
+  id: WarningLineCornerFlippedGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warninglinecorner_flipped_greyscale
+
+- type: decal
+  id: WarnCorner
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_corner
+
+- type: decal
+  id: WarnCornerGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_corner_greyscale
+
+- type: decal
+  id: WarnCornerFlipped
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_corner_flipped
+
+- type: decal
+  id: WarnCornerFlippedGreyscale
+  tags: ["station", "markings"]
+  sprite:
+    sprite: Decals/markings.rsi
+    state: warn_corner_flipped_greyscale
diff --git a/Resources/Prototypes/Palettes/departmental.yml b/Resources/Prototypes/Palettes/departmental.yml
new file mode 100644
index 0000000000..b48705030d
--- /dev/null
+++ b/Resources/Prototypes/Palettes/departmental.yml
@@ -0,0 +1,13 @@
+- type: palette
+  id: Departmental
+  name: Departmental
+  colors:
+    command: "#52B4E996"
+    service: "#9FED5896"
+    engineering: "#EFB34196"
+    security: "#DE3A3A96"
+    bar: "#79150096"
+    science: "#D381C996"
+    cargo: "#A4610696"
+    neutral: "#D4D4D496"
+    neutralLight: "#D4D4D428"
diff --git a/Resources/Prototypes/Palettes/sixteen.yml b/Resources/Prototypes/Palettes/sixteen.yml
new file mode 100644
index 0000000000..b46d44482c
--- /dev/null
+++ b/Resources/Prototypes/Palettes/sixteen.yml
@@ -0,0 +1,20 @@
+- type: palette
+  id: Sixteen
+  name: Sixteen
+  colors:
+    black: "#1D1D21"
+    red: "#B02E26"
+    green: "#5E7C16"
+    brown: "#835432"
+    blue: "#3C44AA"
+    purple: "#8932B8"
+    cyan: "#169C9C"
+    "light gray": "#9D9D97"
+    gray: "#474F52"
+    pink: "#F38BAA"
+    lime: "#80C71F"
+    yellow: "#FED83D"
+    "light blue": "#3AB3DA"
+    magenta: "#C74EBD"
+    orange: "#F9801D"
+    white: "#F9FFFE"
diff --git a/Resources/Textures/Decals/Overlays/greyscale.rsi/checkerNESW.png b/Resources/Textures/Decals/Overlays/greyscale.rsi/checkerNESW.png
new file mode 100644
index 0000000000..29a59de08f
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new file mode 100644
index 0000000000..91128dceaa
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diff --git a/Resources/Textures/Decals/Overlays/greyscale.rsi/fulltile_overlay.png b/Resources/Textures/Decals/Overlays/greyscale.rsi/fulltile_overlay.png
new file mode 100644
index 0000000000..6c3bbaa867
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diff --git a/Resources/Textures/Decals/Overlays/greyscale.rsi/halftile_overlay.png b/Resources/Textures/Decals/Overlays/greyscale.rsi/halftile_overlay.png
new file mode 100644
index 0000000000..261d2e7477
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diff --git a/Resources/Textures/Decals/Overlays/greyscale.rsi/halftile_overlay_180.png b/Resources/Textures/Decals/Overlays/greyscale.rsi/halftile_overlay_180.png
new file mode 100644
index 0000000000..a8a0174fb3
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diff --git a/Resources/Textures/Decals/Overlays/greyscale.rsi/halftile_overlay_270.png b/Resources/Textures/Decals/Overlays/greyscale.rsi/halftile_overlay_270.png
new file mode 100644
index 0000000000..170ebc4e83
Binary files /dev/null and b/Resources/Textures/Decals/Overlays/greyscale.rsi/halftile_overlay_270.png differ
diff --git a/Resources/Textures/Decals/Overlays/greyscale.rsi/halftile_overlay_90.png b/Resources/Textures/Decals/Overlays/greyscale.rsi/halftile_overlay_90.png
new file mode 100644
index 0000000000..e289f67fbe
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diff --git a/Resources/Textures/Decals/Overlays/greyscale.rsi/meta.json b/Resources/Textures/Decals/Overlays/greyscale.rsi/meta.json
new file mode 100644
index 0000000000..3823a28a1a
--- /dev/null
+++ b/Resources/Textures/Decals/Overlays/greyscale.rsi/meta.json
@@ -0,0 +1,44 @@
+{
+  "version": 1,
+  "license": "CC-BY-NC-SA-3.0",
+  "copyright": "mirrorcult",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+	{
+      "name": "fulltile_overlay"
+    },
+    {
+      "name": "halftile_overlay"
+    },
+    {
+      "name": "halftile_overlay_90"
+    },
+    {
+      "name": "halftile_overlay_180"
+    },
+    {
+      "name": "halftile_overlay_270"
+    },
+    {
+      "name": "quartertile_overlay"
+    },
+    {
+      "name": "quartertile_overlay_90"
+    },
+    {
+      "name": "quartertile_overlay_180"
+    },
+    {
+      "name": "quartertile_overlay_270"
+    },
+    {
+      "name": "checkerNESW"
+    },
+    {
+      "name": "checkerNWSE"
+    }
+  ]
+}
diff --git a/Resources/Textures/Decals/Overlays/greyscale.rsi/quartertile_overlay.png b/Resources/Textures/Decals/Overlays/greyscale.rsi/quartertile_overlay.png
new file mode 100644
index 0000000000..bfdda367b8
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diff --git a/Resources/Textures/Decals/Overlays/greyscale.rsi/quartertile_overlay_180.png b/Resources/Textures/Decals/Overlays/greyscale.rsi/quartertile_overlay_180.png
new file mode 100644
index 0000000000..4205f469f6
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new file mode 100644
index 0000000000..7cec69b2e8
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new file mode 100644
index 0000000000..c2d6b37ef9
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diff --git a/Resources/Textures/Decals/dirty.rsi/damaged.png b/Resources/Textures/Decals/dirty.rsi/damaged.png
new file mode 100644
index 0000000000..d7981e2707
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diff --git a/Resources/Textures/Decals/dirty.rsi/dirt.png b/Resources/Textures/Decals/dirty.rsi/dirt.png
new file mode 100644
index 0000000000..8ab88564d0
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diff --git a/Resources/Textures/Decals/dirty.rsi/dirtheavy.png b/Resources/Textures/Decals/dirty.rsi/dirtheavy.png
new file mode 100644
index 0000000000..cb5daa5bb3
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diff --git a/Resources/Textures/Decals/dirty.rsi/dirtlight.png b/Resources/Textures/Decals/dirty.rsi/dirtlight.png
new file mode 100644
index 0000000000..f09c39ad24
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diff --git a/Resources/Textures/Decals/dirty.rsi/dirtmedium.png b/Resources/Textures/Decals/dirty.rsi/dirtmedium.png
new file mode 100644
index 0000000000..73aacf921f
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diff --git a/Resources/Textures/Decals/dirty.rsi/meta.json b/Resources/Textures/Decals/dirty.rsi/meta.json
new file mode 100644
index 0000000000..a0fc84edfd
--- /dev/null
+++ b/Resources/Textures/Decals/dirty.rsi/meta.json
@@ -0,0 +1,32 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-3.0",
+  "copyright": "tgstation at 606005645d3a14c4439e5ce14785650121b22678",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+    {
+      "name": "dirt"
+    },
+    {
+      "name": "dirtlight",
+    },
+    {
+      "name": "dirtmedium",
+    },
+    {
+      "name": "dirtheavy",
+    },
+    {
+      "name": "damaged",
+    },
+    {
+      "name": "remains"
+    },
+    {
+      "name": "rust"
+    }
+  ]
+}
diff --git a/Resources/Textures/Decals/dirty.rsi/remains.png b/Resources/Textures/Decals/dirty.rsi/remains.png
new file mode 100644
index 0000000000..d256579900
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new file mode 100644
index 0000000000..02f745d07f
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diff --git a/Resources/Textures/Decals/markings.rsi/arrows.png b/Resources/Textures/Decals/markings.rsi/arrows.png
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index 0000000000..2925a9bb79
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index 0000000000..707fb41ee3
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diff --git a/Resources/Textures/Decals/markings.rsi/bot.png b/Resources/Textures/Decals/markings.rsi/bot.png
new file mode 100644
index 0000000000..f745fb8a66
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diff --git a/Resources/Textures/Decals/markings.rsi/bot_greyscale.png b/Resources/Textures/Decals/markings.rsi/bot_greyscale.png
new file mode 100644
index 0000000000..b3e5189bd9
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diff --git a/Resources/Textures/Decals/markings.rsi/bot_left.png b/Resources/Textures/Decals/markings.rsi/bot_left.png
new file mode 100644
index 0000000000..8bbf972bcf
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diff --git a/Resources/Textures/Decals/markings.rsi/bot_left_greyscale.png b/Resources/Textures/Decals/markings.rsi/bot_left_greyscale.png
new file mode 100644
index 0000000000..dc838a22cc
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diff --git a/Resources/Textures/Decals/markings.rsi/bot_right.png b/Resources/Textures/Decals/markings.rsi/bot_right.png
new file mode 100644
index 0000000000..fe0534ac4e
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diff --git a/Resources/Textures/Decals/markings.rsi/bot_right_greyscale.png b/Resources/Textures/Decals/markings.rsi/bot_right_greyscale.png
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index 0000000000..71cc55563c
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diff --git a/Resources/Textures/Decals/markings.rsi/box.png b/Resources/Textures/Decals/markings.rsi/box.png
new file mode 100644
index 0000000000..499964c500
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diff --git a/Resources/Textures/Decals/markings.rsi/box_greyscale.png b/Resources/Textures/Decals/markings.rsi/box_greyscale.png
new file mode 100644
index 0000000000..68a14242ed
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diff --git a/Resources/Textures/Decals/markings.rsi/caution.png b/Resources/Textures/Decals/markings.rsi/caution.png
new file mode 100644
index 0000000000..de18429ba3
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diff --git a/Resources/Textures/Decals/markings.rsi/caution_greyscale.png b/Resources/Textures/Decals/markings.rsi/caution_greyscale.png
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index 0000000000..5015249e6c
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diff --git a/Resources/Textures/Decals/markings.rsi/delivery.png b/Resources/Textures/Decals/markings.rsi/delivery.png
new file mode 100644
index 0000000000..838a7ce637
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diff --git a/Resources/Textures/Decals/markings.rsi/delivery_greyscale.png b/Resources/Textures/Decals/markings.rsi/delivery_greyscale.png
new file mode 100644
index 0000000000..3b627e7152
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diff --git a/Resources/Textures/Decals/markings.rsi/loading_area.png b/Resources/Textures/Decals/markings.rsi/loading_area.png
new file mode 100644
index 0000000000..4d61201ff8
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diff --git a/Resources/Textures/Decals/markings.rsi/loading_area_greyscale.png b/Resources/Textures/Decals/markings.rsi/loading_area_greyscale.png
new file mode 100644
index 0000000000..d3e3cd9fc1
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diff --git a/Resources/Textures/Decals/markings.rsi/meta.json b/Resources/Textures/Decals/markings.rsi/meta.json
new file mode 100644
index 0000000000..a76a69d2eb
--- /dev/null
+++ b/Resources/Textures/Decals/markings.rsi/meta.json
@@ -0,0 +1,113 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-3.0",
+  "copyright": "tgstation at 606005645d3a14c4439e5ce14785650121b22678",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+    {
+      "name": "arrows"
+    },
+    {
+      "name": "arrows_greyscale"
+    },
+    {
+      "name": "bot",
+    },
+    {
+      "name": "bot_greyscale",
+    },
+    {
+      "name": "bot_left",
+    },
+    {
+      "name": "bot_left_greyscale",
+    },
+    {
+      "name": "bot_right"
+    },
+    {
+      "name": "bot_right_greyscale"
+    },
+    {
+      "name": "box"
+    },
+    {
+      "name": "box_greyscale"
+    },
+    {
+      "name": "caution"
+    },
+    {
+      "name": "caution_greyscale",
+    },
+    {
+      "name": "delivery",
+    },
+    {
+      "name": "delivery_greyscale",
+    },
+    {
+      "name": "loading_area",
+    },
+    {
+      "name": "loading_area_greyscale"
+    },
+    {
+      "name": "standclear"
+    },
+    {
+      "name": "standclear_greyscale"
+    },
+    {
+      "name": "warn_box"
+    },
+    {
+      "name": "warn_box_greyscale"
+    },
+    {
+      "name": "warn_end"
+    },
+    {
+      "name": "warn_end_greyscale",
+    },
+    {
+      "name": "warn_full",
+    },
+    {
+      "name": "warn_full_greyscale",
+    },
+    {
+      "name": "warningline",
+    },
+    {
+      "name": "warningline_greyscale"
+    },
+    {
+      "name": "warninglinecorner"
+    },
+    {
+      "name": "warninglinecorner_greyscale"
+    },
+    {
+      "name": "warninglinecorner_flipped"
+    },
+    {
+      "name": "warninglinecorner_flipped_greyscale"
+    },
+    {
+      "name": "warn_corner"
+    },
+    {
+      "name": "warn_corner_greyscale"
+    },
+    {
+      "name": "warn_corner_flipped"
+    },
+    {
+      "name": "warn_corner_flipped_greyscale"
+    }
+  ]
+}
diff --git a/Resources/Textures/Decals/markings.rsi/standclear.png b/Resources/Textures/Decals/markings.rsi/standclear.png
new file mode 100644
index 0000000000..3b46ec5702
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index 0000000000..a87b7b7035
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index 0000000000..593e5c0af9
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diff --git a/Resources/Textures/Decals/markings.rsi/warn_corner.png b/Resources/Textures/Decals/markings.rsi/warn_corner.png
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index 0000000000..9554281555
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diff --git a/Resources/Textures/Decals/markings.rsi/warn_corner_flipped.png b/Resources/Textures/Decals/markings.rsi/warn_corner_flipped.png
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index 0000000000..68d6f1b7b7
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index 0000000000..8b10583222
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index 0000000000..4e930c2b24
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diff --git a/Resources/Textures/Decals/markings.rsi/warn_end.png b/Resources/Textures/Decals/markings.rsi/warn_end.png
new file mode 100644
index 0000000000..1f9fe52857
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diff --git a/Resources/Textures/Decals/markings.rsi/warn_end_greyscale.png b/Resources/Textures/Decals/markings.rsi/warn_end_greyscale.png
new file mode 100644
index 0000000000..b7e1da2682
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diff --git a/Resources/Textures/Decals/markings.rsi/warn_full.png b/Resources/Textures/Decals/markings.rsi/warn_full.png
new file mode 100644
index 0000000000..a417990d20
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diff --git a/Resources/Textures/Decals/markings.rsi/warn_full_greyscale.png b/Resources/Textures/Decals/markings.rsi/warn_full_greyscale.png
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index 0000000000..3de982e501
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diff --git a/Resources/Textures/Decals/markings.rsi/warningline.png b/Resources/Textures/Decals/markings.rsi/warningline.png
new file mode 100644
index 0000000000..5d736b9937
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diff --git a/Resources/Textures/Decals/markings.rsi/warningline_greyscale.png b/Resources/Textures/Decals/markings.rsi/warningline_greyscale.png
new file mode 100644
index 0000000000..1cfbf4bd02
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diff --git a/Resources/Textures/Decals/markings.rsi/warninglinecorner.png b/Resources/Textures/Decals/markings.rsi/warninglinecorner.png
new file mode 100644
index 0000000000..fa87b32791
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diff --git a/Resources/Textures/Decals/markings.rsi/warninglinecorner_flipped.png b/Resources/Textures/Decals/markings.rsi/warninglinecorner_flipped.png
new file mode 100644
index 0000000000..48083acd28
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diff --git a/Resources/Textures/Decals/markings.rsi/warninglinecorner_flipped_greyscale.png b/Resources/Textures/Decals/markings.rsi/warninglinecorner_flipped_greyscale.png
new file mode 100644
index 0000000000..631b1b6bbc
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diff --git a/Resources/Textures/Decals/markings.rsi/warninglinecorner_greyscale.png b/Resources/Textures/Decals/markings.rsi/warninglinecorner_greyscale.png
new file mode 100644
index 0000000000..617a1e876d
Binary files /dev/null and b/Resources/Textures/Decals/markings.rsi/warninglinecorner_greyscale.png differ
diff --git a/Resources/keybinds.yml b/Resources/keybinds.yml
index a72c73e158..b133b64635 100644
--- a/Resources/keybinds.yml
+++ b/Resources/keybinds.yml
@@ -314,6 +314,9 @@ binds:
 - function: OpenAdminMenu
   type: State
   key: F7
+- function: OpenDecalSpawnWindow
+  type: State
+  key: F8
 - function: OpenSandboxWindow
   type: State
   key: B