// Determine if the background color of an element is light or dark.
(function(d){d.fn.lightOrDark=function(){var b,c,a;a=this.css("background-color");a.match(/^rgb/)?(a=a.match(/^rgba?\((\d+),\s*(\d+),\s*(\d+)(?:,\s*(\d+(?:\.\d+)?))?\)$/),b=a[1],c=a[2],a=a[3]):(a=+("0x"+a.slice(1).replace(5>a.length&&/./g,"$&$&")),b=a>>16,c=a>>8&255,a&=255);127.5<Math.sqrt(0.299*b*b+0.587*a*a+0.114*c*c)?this.addClass("light"):this.addClass("dark")}})(jQuery);