$(document).ready(function(){
	$(".colour-bg").each(function(){ 
		var colors = ["#60604D","#B0AEA3","#231F20","#4C565C","#A7A9AB"]; 
		var rand = Math.floor(Math.random()*colors.length); 
		$(this).css("background-color", colors[rand]);
	});
});