diff --git a/Ooui.Forms/Extensions/ColorExtensions.cs b/Ooui.Forms/Extensions/ColorExtensions.cs
index ad432ab..3fb59c2 100644
--- a/Ooui.Forms/Extensions/ColorExtensions.cs
+++ b/Ooui.Forms/Extensions/ColorExtensions.cs
@@ -6,7 +6,15 @@ namespace Ooui.Forms.Extensions
 	{
 		public static Color ToOouiColor (this Xamarin.Forms.Color color)
 		{
-            return new Color ((byte)(color.R * 255.0 + 0.5), (byte)(color.G * 255.0 + 0.5), (byte)(color.B * 255.0 + 0.5), (byte)(color.A * 255.0 + 0.5));
+            const byte defaultRed = 0;
+            const byte defaultGreen = 0;
+            const byte defaultBlue = 0;
+            const byte defaultAlpha = 255;
+            byte r = color.R < 0 ? defaultRed : (byte)(color.R * 255.0 + 0.5);
+            byte g = color.G < 0 ? defaultGreen : (byte)(color.G * 255.0 + 0.5);
+            byte b = color.B < 0 ? defaultBlue : (byte)(color.B * 255.0 + 0.5);
+            byte a = color.A < 0 ? defaultAlpha : (byte)(color.A * 255.0 + 0.5);
+            return new Color (r, g, b, a);
 		}
 
         public static Color ToOouiColor (this Xamarin.Forms.Color color, Xamarin.Forms.Color defaultColor)