JS generates random colors (rgb)

/*随机获取颜色*/
function getRandomColor() {
    var r = Math.floor(Math.random() * 256);
    var g = Math.floor(Math.random() * 256);
    var b = Math.floor(Math.random() * 256);
    return "rgb(" + r + ',' + g + ',' + b + ")";
    //return '#' + Math.floor(Math.random() * 0xffffff).toString(16);
}