Source code

Revision control

Copy as Markdown

Other Tools

<!DOCTYPE html>
<meta charset="utf-8">
<style>
.ref { background-color: oklch(1 0.2 45); border: 1px solid black; width: 200px; height: 200px; }
</style>
<body>
<p>Test passes if you see a square border with a single color inside.</p>
<div class="ref"></div>
</body>