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

sky/sdk/lib/framework/rendering/paragraph.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:sky' as sky;
 import 'box.dart';
 import 'node.dart';
 
 class RenderInline extends RenderNode {
   String data;
 
   RenderInline(this.data);
 }
 
 class RenderParagraph extends RenderBox {
 
   RenderParagraph({
     String text,
-    int color
+    sky.Color color
   }) : _color = color {
     _layoutRoot.rootElement = _document.createElement('p');
     this.text = text;
   }
 
   final sky.Document _document = new sky.Document();
   final sky.LayoutRoot _layoutRoot = new sky.LayoutRoot();
 
   String get text => (_layoutRoot.rootElement.firstChild as sky.Text).data;
   void set text (String value) {
     _layoutRoot.rootElement.setChild(_document.createText(value));
     markNeedsLayout();
   }
 
-  int _color = 0xFF000000;
-  int get color => _color;
-  void set color (int value) {
+  sky.Color _color = const sky.Color(0xFF000000);
+  sky.Color get color => _color;
+  void set color (sky.Color value) {
     if (_color != value) {
       _color = value;
       markNeedsPaint();
     }
   }
 
   sky.Size getIntrinsicDimensions(BoxConstraints constraints) {
     assert(false);
     return null;
     // we don't currently support this for RenderParagraph
   }
 
   void performLayout() {
     _layoutRoot.maxWidth = constraints.maxWidth;
     _layoutRoot.minWidth = constraints.minWidth;
     _layoutRoot.minHeight = constraints.minHeight;
     _layoutRoot.maxHeight = constraints.maxHeight;
     _layoutRoot.layout();
     size = constraints.constrain(new sky.Size(_layoutRoot.rootElement.width, _layoutRoot.rootElement.height));
   }
 
   void paint(RenderNodeDisplayList canvas) {
     // _layoutRoot.rootElement.style['color'] = 'rgba(' + ...color... + ')';
     _layoutRoot.paint(canvas);
   }
 
   // we should probably expose a way to do precise (inter-glpyh) hit testing
 }