JavaScript实现rgb转为16进制

代码块

function RGBToHex(rgb){    var regexp = /[0-9]{0,3}/g;    var re = rgb.match(regexp);//利用正则表达式去掉多余的部分，将rgb中的数字提取    var hexColor = "#"; var hex = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'];    for (var i = 0; i < re.length; i++) {        var r = null, c = re[i], l = c;        var hexAr = [];        while (c > 16){            r = c % 16;            c = (c / 16) >> 0;            hexAr.push(hex[r]);        } hexAr.push(hex[c]);        if(l < 16&&l != ""){            hexAr.push(0)        }        hexColor += hexAr.reverse().join('');    }    //alert(hexColor)    return hexColor;}