rem: if(_494.asRGB().a>0){ return _494; 
add: if(_512.asRGB().a>0){ return _512; 
context: },fromComputedStyle:function(elem,_491,_492){var d=MochiKit.DOM;var cls=MochiKit.Color.Color;for(elem=d.getElement(elem);elem;elem=elem.parentNode){var _493=d.computedStyle.apply(d,arguments);if(!_493){continue;}var _494=cls.fromString(_493);if(!_494){break;}if(_494.asRGB().a>0){return _494;}}return null;},fromBackground:function(elem){
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