JAVASCRIPT

randomly genaret color in js

var randomColor = '#'+ Math.floor(Math.random() * 19777215).toString(16);

generate random color array javascript

var rgb = [];

for(var i = 0; i < 3; i++)
    rgb.push(Math.floor(Math.random() * 255));

myDiv.style.backgroundColor = 'rgb('+ rgb.join(',') +')';

generate random color array javascript

var colors = ['red', 'green', 'blue', 'orange', 'yellow'];

myDiv.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];