chromium/third_party/blink/web_tests/fast/backgrounds/root-background-propagation2.html

<!DOCTYPE html>
<html>
<head>
    <style>
        html {
            background-color: green;
        }
        body {
            background-color: #0F0;
            height: 100px;
        }
        p {
            color: #0F0; /* Hide from pixel result */
        }
    </style>
</head>
<body>
    <p>Should see a 100px tall light green rect on a field of green.</p>
</body>
</html>