[JavaScript] rgb to hex

if($(this).css("color")){

var rgbSplit = $(this).css("color").split("(")[1].split(")")[0];

rgbSplit = rgbSplit.split(",");

var hex = rgbSplit.map(function(x){

x = parseInt(x).toString(16);

return (x.length==1) ? "0"+x : x;

});

hex = hex.join("");

}else{

var hex = "FFFFFF";

}