I think what you are trying to accomplish is this:
Assuming you have a HTML page like this:
<html>
<body>
<h1>Hello World!</h1>
<div id="controls-wrapper>some text</div>
</body>
$(document).ready(function(){
var colors = ["#CCCCCC","#333333","#990099"];
var rand = Math.floor(Math.random()*colors.length);
$('#controls-wrapper').css("background-color", colors[rand]);
$('h1').css("color", colors[rand]);
});
After you have created your colors array you then get a random number corresponding to the index of a color.
Now that you have a random index you can use it to set the background-color, or text color of an object.
If you wanted the colors to be different for each then you would just call
rand = Math.floor(Math.random()*colors.length);
again before setting the color of your next element.
And finally by calling $('h1').css("color", colors[rand]);
you will set the color on all H1 elements on the page, you want it to be specific set an ID or class value on the H1 and then use $('h1.myclass').css("color", colors[rand]);
OR $('#ID_for_my_H1').css("color", colors[rand]);
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