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<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title>NEGATED :checked pseudo-class</title>
  <style type="text/css"><![CDATA[input, span { background-color : red }
input:not(:checked), input:not(:checked) + span { background-color : lime}]]></style>
  <link rel="author" title="Daniel Glazman" href="http://glazman.org/"/>
  <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 -->
  <meta name="flags" content="" />
 </head>
 <body>
<p>
<input type="checkbox"></input> <span>Everything in this paragraph should have a green background</span></p>
</body>
</html>