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chromium/third_party/blink/web_tests/fast/forms/accent-color/accent-color-invalidation.html 

<!DOCTYPE html>
<script src="../../../resources/run-after-layout-and-paint.js"></script>

<div>The following checkbox should be red: <input type=checkbox checked></div>

<script>
testRunner.waitUntilDone();

const input = document.querySelector('input');
input.style = 'accent-color: green';

runAfterLayoutAndPaint(() => {
  input.style = 'accent-color: red';
  testRunner.notifyDone();
});
</script>