/**
                             * Adds support for color properties in <code>to</code>
                             * and <code>from</code> attributes.
                             * @module anim
                             * @submodule anim-color
                             */
                            
                            var NUM = Number;
                            
                            Y.Anim.getUpdatedColorValue = function(fromColor, toColor, elapsed, duration,  fn)
                            {
                                fromColor = Y.Color.re_RGB.exec(Y.Color.toRGB(fromColor));
                                toColor = Y.Color.re_RGB.exec(Y.Color.toRGB(toColor));
                            
                                if (!fromColor || fromColor.length < 3 || !toColor || toColor.length < 3) {
                                    Y.error('invalid from or to passed to color behavior');
                                }
                            
                                return 'rgb(' + [
                                    Math.floor(fn(elapsed, NUM(fromColor[1]), NUM(toColor[1]) - NUM(fromColor[1]), duration)),
                                    Math.floor(fn(elapsed, NUM(fromColor[2]), NUM(toColor[2]) - NUM(fromColor[2]), duration)),
                                    Math.floor(fn(elapsed, NUM(fromColor[3]), NUM(toColor[3]) - NUM(fromColor[3]), duration))
                                ].join(', ') + ')';
                            };
                            
                            Y.Anim.behaviors.color = {
                                set: function(anim, att, from, to, elapsed, duration, fn) {
                                    anim._node.setStyle(att, Y.Anim.getUpdatedColorValue(from, to, elapsed, duration, fn));
                                },
                            
                                // TODO: default bgcolor const
                                get: function(anim, att) {
                                    var val = anim._node.getComputedStyle(att);
                                    val = (val === 'transparent') ? 'rgb(255, 255, 255)' : val;
                                    return val;
                                }
                            };
                            
                            Y.each(['backgroundColor',
                                    'borderColor',
                                    'borderTopColor',
                                    'borderRightColor',
                                    'borderBottomColor',
                                    'borderLeftColor'],
                                    function(v) {
                                        Y.Anim.behaviors[v] = Y.Anim.behaviors.color;
                                    }
                            );