509155-1-ref.xhtml

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<html xmlns="http://www.w3.org/1999/xhtml" style="outline-color: black;">

  <head>

    <style>

      html { color: black; outline-width: 10px; outline-style: solid; }

    </style>

  </head>

  <body>

    <html style="outline-color: green;">Test</html>

  </body>

</html>