chromium/third_party/blink/web_tests/external/wpt/css/css-color/whitetext-ref.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>White text reference</title>
<style>
    .test { color: #FFFFFF; background-color: #333; padding: 3px}
</style>
<body>
    <p class="test">Test passes if this text is white</p>
</body>