<!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <svg xmlns="http://www.w3.org/2000/svg" > <title>Testcase for fallback colours</title> <!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=368840 --> <rect x="0%" y="0%" width="100%" height="100%" fill="url(#null)"/> </svg>