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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Color 4: Verify lightness in Lab is always clamped to a value between 0 to 100</title>
<style>
.ref { background-color: lab(100 150 20); 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>