Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/fast/forms/color/color-suggestion-picker-one-row-appearance.html 

<!DOCTYPE html>
<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-1000">
<script src="../../../resources/testdriver.js"></script>
<script src="../../../resources/testdriver-vendor.js"></script>
<script src="../resources/picker-common.js"></script>

<body style="background-color: #777777">
<input type=color value="#ff0000" list=single focus>
<datalist id=single>
    <option>#000000</option>
</datalist>

<script>
  window.onload = openPickerAppearanceOnly(document.querySelector('input'));
</script>