<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> Composite Color Crash Test </title>
<style>
.kaboom {
margin: 100px;
border-width: 20px 20px 20px 20px;
-moz-border-top-colors: green red green;
border-style: solid;
width: 70px;
height: 70px;
}
</style>
</head>
<body>
<div id="box" class="kaboom"></div>
</body>
</html>