<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Color 4: CSS Color 4: hwb</title>
<style>
    .test { background-color: rgb(20% 70% 20%); width: 12em; height: 12em; } /* hwb(120 20% 30%) converted to sRGB */
</style>
<body>
    <p>Test passes if you see a single square, and not two rectangles of different colors.</p>
    <div class="test"></div>
</body>