<!DOCTYPE html>
<html>
  <head>
  <style>
    .box {
      width: 153px;
      height: 153px;
      margin: 10px;
      border-width: 20px;
      border-color: black;
      border-style: groove;
    }
  </style>
  </head>
<body>
  <!-- Test mixed border styles. Expect a square with borders with
       2 colors (dark/lighter), it fails if it has a solid dark border.
    -->
  <div class="box"></div>
</body>
</html>