js 颜色16进制转RGB方法

function getRGB(arr){
    arr = arr.substr(1);
    var str;
    var result;
    var a = [];
    for (var i = 0; i < 3; i++){
        str = arr.substr(i*2,2);
        a[i] = parseInt(str, 16);
    }
    result = "\"rgb(" + a[0]+", " + a[1] +", " + a[2] +") \" ";
    return result;
}
console.log(getRGB("#0000FF"));