Defines the default background color of the Overlay for this window.
For this value to be valid you must provide an array of three or four elements that represent a color with the {r, g, b} or {r, g, b, a} format.
See also OverlayCanvasSettingsAttribute.defaultColorDark and OverlayCanvasSettingsAttribute.defaultColorLight.
using UnityEditor; using UnityEditor.Overlays; [OverlayCanvasSettings(defaultColor = new float[] {1, 0, 0, 0.8f}, defaultColorDark = new float[] { 1, 0, 0, 0.8f }, defaultColorLight = new float[] { 0, 0, 1, 0.8f })] public class OverlayCanvasSettingsExample : EditorWindow, ISupportsOverlays { [MenuItem("Test/Open Canvas Window")] static void OpenWindow() { GetWindow<OverlayCanvasSettingsExample>(); } }