<html><head>
<title>Parsing : vs ::</title>
<style type="text/css">
div { color: green; }
p::first-child { color: yellow; 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-green-color.xht">
<meta name="flags" content="">
</head>
<body>
<div>
<p>This line should be green.</p>
</div>
</body></html>