<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html>
 <head>
  <title>::selection pseudo-element</title>
  <style type="text/css">
  .highlight { background-color: rgba(99, 254, 0, 0.95); }
  </style>
 </head>
 <body>
<!-- This result mimics the text-wrapping that would occur in a window with size 800 x 600 pixels. -->
<p style="margin-bottom: 0" class="highlight">Any textual selection in this long paragraph should have green background. Any textual selection in this long paragraph</p><p style="margin-top: 0"><span class="highlight">should have green background. Any textual selection in this long paragraph should have green background.</span></p>
</body>
</html>