NebulaLauncher/Nebula.Launcher/Assets/AppResources.axaml

<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <SolidColorBrush x:Key="DefaultBackground">#222222</SolidColorBrush>
    <SolidColorBrush x:Key="DefaultForeground">#121212</SolidColorBrush>
    <SolidColorBrush x:Key="DefaultSelected">#D95F59</SolidColorBrush>
    <BoxShadows x:Key="DefaultShadow">0 0 10 -1 #121212</BoxShadows>
    <LinearGradientBrush EndPoint="100%,50%" StartPoint="0%,50%" x:Key="DefaultGrad">
        <GradientStop Color="#262222" Offset="0.0" />
        <GradientStop Color="#222222" Offset="1.0" />
    </LinearGradientBrush>
</ResourceDictionary>