Update BoxDecoration and RenderParagraph to use sky.Color instead of int.

sky/sdk/lib/framework/components2/tool_bar.dart

Index: sky/sdk/lib/framework/components2/tool_bar.dart
diff --git a/sky/sdk/lib/framework/components2/tool_bar.dart b/sky/sdk/lib/framework/components2/tool_bar.dart
index 7b8b25297db42040fd6b0631e0e5efa0e8cdef42..bb1561ff4533abdb69a0e017e1df79cd1f13f625 100644
--- a/sky/sdk/lib/framework/components2/tool_bar.dart
+++ b/sky/sdk/lib/framework/components2/tool_bar.dart
@@ -43,7 +43,7 @@ class ToolBar extends Component {
       ),
       desiredSize: new sky.Size.fromHeight(56.0),
       // padding: new EdgeDims(kStatusBarHeight.toDouble(), 8.0, 0.0, 8.0),
-      decoration: new BoxDecoration(backgroundColor: backgroundColor.value)
+      decoration: new BoxDecoration(backgroundColor: backgroundColor)
     );
   }
 }