<!doctype HTML> <title>Opacity on the root element blends with a white backdrop</title> <link rel="author" title="Chris Harrelson" href="mailto:chrishtr@chromium.org"> <link rel="help" href="https://drafts.fxtf.org/compositing/#pagebackdrop"> <html style="background: #DDD"> <div id=spacer style="width: 100px; height: 3000px"></div> </html>