Add very basic RGB/RGBA color parsing support

index.js

@@ -92,9 +92,19 @@ Parser.prototype.string = function(){
   return this.single() || this.double();
 };
 
+Parser.prototype.color = function(){
+  var m = /^(rgba?\([^)]*\)) */.exec(this.str);
+  if (!m) return m;
+  this.skip(m);
+  return {
+    type: 'color',
+    value: m[1]
+  }
+};
 
 Parser.prototype.value = function(){
   return this.number()
+    || this.color()
     || this.ident()
     || this.string()
     || this.comma();

test/cases/colors.js

@@ -0,0 +1,6 @@
+exports.string = 'rgba(1,2,3,4) rgb(9,8,7)';
+
+exports.object = [
+  { type: 'color', value: 'rgba(1,2,3,4)' },
+  { type: 'color', value: 'rgb(9,8,7)' }
+];