<html>
<head>
<style type="text/css">
body {
    font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; 
    font-weight: 300;
	content: "";
	  display: inline-block;
	  width: 100%;
	     font-size: 364px;
		 
}
 
</style>

 
</head>
<body onload="return ran_col()" id="dynamicDiv2"  >
    <div id="dynamicDiv"><span id="dynamicSpan" >  <center>JjjL </center></span></div>
  
</body>

<script type="text/javascript">
            function ran_col() { //function name
                var color = '#'; // hexadecimal starting symbol
                var letters = [ 'FF0000','00FF00','0000FF','FFFF00','00FFFF','FF00FF','C0C0C0']; //Set your colors here
                color += letters[Math.floor(Math.random() * letters.length)];
                document.getElementById('dynamicDiv2').style.background = color; // Setting the random color on your div element.
            }
        </script>
			
</html>