diff --git a/Resources/Prototypes/Decals/Overlays/grayscale.yml b/Resources/Prototypes/Decals/Overlays/grayscale.yml
index 76e6e6b071..dfebeee3f9 100644
--- a/Resources/Prototypes/Decals/Overlays/grayscale.yml
+++ b/Resources/Prototypes/Decals/Overlays/grayscale.yml
@@ -206,6 +206,14 @@
     sprite: Decals/Overlays/greyscale.rsi
     state: threequartertile_overlay_270
 
+- type: decal
+  id: MonoOverlay
+  tags: ["station", "overlay"]
+  defaultCustomColor: true
+  sprite:
+    sprite: Decals/Overlays/greyscale.rsi
+    state: mono
+
 - type: decal
   id: CheckerNESW
   tags: ["station", "overlay"]