css/compositing/root-element-blend-mode.html

<!doctype HTML>
<title>Blend-mode on the root stacking context blends with the root element's background.</title>
<link rel="author" title="Chris Harrelson" href="mailto:chrishtr@chromium.org">
<link rel="help" href="https://drafts.fxtf.org/compositing/#pagebackdrop">
<link rel="match" href="root-element-blend-mode-ref.html">
<html style="background: #000;">
  <div style="width: 50px; height: 50px; background: #E33;  mix-blend-mode: multiply"></div>
  <div id=spacer style="width: 100px; height: 3000px"></div>
</html>