ceil/floor/truncate/round return integers.

samples/logo/logo.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. 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:html';
 import 'dart:svg';
 import 'dart:math' as Math;
 
 class Color {
   int hue;
@@ skipping 25 matching lines @@
 
     double s;
     if (max == min) {
       s = 0.0;
     } else if (l < 0.5) {
       s = d/(2*l);
     } else {
       s = d/(2 - 2*l);
     }
 
-    return new Color((h.round() % 360).toInt(), s, l);
+    return new Color(h.round() % 360, s, l);
   }
 
   factory Color.fromHex(String hex) => new Color.rgb(
       _parseHex(hex.substring(1, 3))/255,
       _parseHex(hex.substring(3, 5))/255,
       _parseHex(hex.substring(5, 7))/255);
 
   static int _parseHex(String hex) {
     return int.parse(hex, radix: 16);
   }
@@ skipping 117 matching lines @@
 
   document.query("input[name=invert]").onChange.listen((Event e) {
     InputElement invert = e.target;
     if (invert.checked) {
       logo.classes = ['inverse'];
     } else {
       logo.classes = [];
     }
   });
 }