chromium/third_party/blink/web_tests/fast/forms/color-scheme/radio/radio-appearance-basic.html

<!DOCTYPE html>
<meta name="color-scheme" content="light dark">
<script src="../../../../resources/run-after-layout-and-paint.js"></script>
<script src="../../resources/common.js"></script>
<body style="background-color: blue">

<!-- no style for reference -->
<input type="radio">
<input type="radio" name="group">
<input type="radio" name="group" checked> <br>

<!-- border -->
<input type="radio" style="border: 3px solid lime;">
<input type="radio" style="border-radius: 6px;"> <br>

<!-- background -->
<input type="radio" style="background: linear-gradient(to bottom, #dea 0%,#9c7 44%,#494 100%);"> <br>

<!-- shadow -->
<input type="radio" style="box-shadow: 4px 4px 10px rgba(255,0,0,0.5), inset 4px 4px 4px rgba(0,255,0,0.5);"> <br>

<!-- size -->
<input type="radio" style="width: 8px; height; 8px;">
<input type="radio" style="width: 16px; height; 16px;">
<input type="radio" style="width: 24px; height; 24px;">
<input type="radio" style="width: 26px; height: 20px;">
<input type="radio" style="width: 1px; height: 1px;"> <br>

<!-- disabled -->
<input type="radio" disabled>
<input type="radio" disabled checked> <br>

<!-- zoom -->
<input type="radio" style="zoom: 1.5;">
<input type="radio" style="zoom: 2;">
<input type="radio" style="zoom: 4;"> <br>

<div style="background-color: white">
  <input type="radio" disabled>
  <input type="radio" disabled checked> <br>
  <input type="radio" checked> <br>
  <input type="radio" id="hoverTarget"/>
</div>

<script>

runAfterLayoutAndPaint(function() {
  var target = document.getElementById('hoverTarget');
  hoverOverElement(target);
}, true);

</script>
</body>