Best way to generate a random color in javascript?

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What is the best way to generate a random color in JavaScript Without using any frameworks...

Here are a couple of solutions I came up with:

function get_random_color() 
{
    var color = "";
    for(var i = 0; i < 3; i++) {
        var sub = Math.floor(Math.random() * 256).toString(16);
        color += (sub.length == 1 ? "0" + sub : sub);
    }
    return "#" + color;
}

function get_rand_color()
{
    var color = Math.floor(Math.random() * Math.pow(256, 3)).toString(16);
    while(color.length < 6) {
        color = "0" + color;
    }
    return "#" + color;
}

Are there better ways to do it?

random javascript
10 Answers

A shorter way:

'#'+(0x1000000+Math.random()*0xffffff).toString(16).substr(1,6)
user_1385790

I like your second option, although it can be made a little bit simpler:

// Math.pow is slow, use constant instead.
var color = Math.floor(Math.random() * 16777216).toString(16);
// Avoid loops.
return '#000000'.slice(0, -color.length) + color;
user_1190810

More succinct: 

function get_random_color2() 
{
    var r = function () { return Math.floor(Math.random()*256) };
    return "rgb(" + r() + "," + r() + "," + r() + ")";
}
user_395290

I have created a slightly more complicated solution but one which lets you control the saturation of the colors and the brightness. You can check out the code for SwitchColors.js here https://github.com/akulmehta/SwitchColors.js

user_79920700
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