bug 821593 - add RGBColor webidl r=bz

dom/webidl/RGBColor.webidl

@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-RGBColor
+ */
+
+interface RGBColor {
+  readonly attribute CSSPrimitiveValue  red;
+  readonly attribute CSSPrimitiveValue  green;
+  readonly attribute CSSPrimitiveValue  blue;
+
+  // mozilla specific
+  readonly attribute CSSPrimitiveValue alpha;
+};