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chromium/third_party/blink/web_tests/fast/gradients/list-item-gradient.html 

<html>
<head>
<style>
ul { list-style-image: radial-gradient(#00c9ff, #00b5e2 80%, rgba(0,201,255,0)); }
</style>
</head>
<body>
<ul>
<li>Item One
<li>Item Two
<li>Item Three
</ul>