code: function(){
  		var lightest,
  			maxBrightness = Number.MIN_VALUE;
  		this.each(function(c){
  			var luma = c.luminance();
  			if(luma > maxBrightness){
  				lightest = c;
  				maxBrightness = luma;
  			}
  		});
  		return lightest;
  	}
docs: Finds and returns the lightest (luminance) color of the list.
  @return lightest color or null, if there're no entries yet.