[Effen] Make the material splashes a bit lighter.

sky/framework/components/ink_splash.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 '../animation/animated_value.dart';
 import '../animation/curves.dart';
 import '../animation/generators.dart';
 import '../fn.dart';
 import '../theme/view-configuration.dart' as config;
 import 'dart:async';
@@ skipping 81 matching lines @@
     position: absolute;
     pointer-events: none;
     overflow: hidden;
     top: 0;
     left: 0;
     bottom: 0;
     right: 0;''');
 
   static final Style _splashStyle = new Style('''
     position: absolute;
-    background-color: rgba(0, 0, 0, 0.4);''');
+    background-color: rgba(0, 0, 0, 0.2);''');
 
   Stream<String> onStyleChanged;
 
   double _offsetX;
   double _offsetY;
   String _inlineStyle;
 
   InkSplash(Stream<String> onStyleChanged)
     : onStyleChanged = onStyleChanged,
       super(stateful: true, key: onStyleChanged.hashCode);
@@ skipping 20 matching lines @@
       style: _clipperStyle,
       children: [
         new Container(
           inlineStyle: _inlineStyle,
           style: _splashStyle
         )
       ]
     );
   }
 }