<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<p>There should be a purple square below.</p>
<div style="width:100px; height:100px; background:blue;">
  <div style="opacity:0.5;">
    <div style="width:100px; height:100px; background:red;"></div>
  </div>
</div>
