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chromium/third_party/blink/web_tests/external/wpt/css/css-color/t423-transparent-2-a-ref.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reference</title>
<link rel="author" title="Intel" href="http://www.intel.com">
<style>
  body { background-color: black; }
  p { color: white; }
</style>
<body>
  <p>This should be the only text visible on this page.</p>
</body>