<!DOCTYPE html><html><head>
<title>Syntax and parsing</title>
<style type="text/css">
p { background: lime; }
.\5cm { background: red; }
</style>
<link rel="author" title="Ian Hickson" href="mailto:ian@hixie.ch">
<link rel="help" href="https://www.w3.org/TR/css3-selectors/#selectors"> <!-- bogus link to make sure it gets found -->
<link rel="match" href="reference/this-line-lime-background.xht">
<meta name="flags" content="">
</head>
<body>
<p class="5cm">This line should have a green background.</p>
</body></html>