diff --git a/MBS.Framework/Drawing/Color.cs b/MBS.Framework/Drawing/Color.cs
index 1bb6a07..ad17a2d 100644
--- a/MBS.Framework/Drawing/Color.cs
+++ b/MBS.Framework/Drawing/Color.cs
@@ -28,6 +28,7 @@ namespace MBS.Framework.Drawing
 		public static readonly Color Empty;
 
 		private bool isNotEmpty;
+		public bool IsEmpty { get { return !isNotEmpty; } }
 
 		private double mvarR;
 		public double R { get { return mvarR; } set { mvarR = value; } }