color——RGB转16进制

function colorRGB2Hex(color) {
    var rgb = color.split(',');
    var r = parseInt(rgb[0].split('(')[1]);
    var g = parseInt(rgb[1]);
    var b = parseInt(rgb[2].split(')')[0]);

    var hex = "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
    return hex;
 }