<html>
<head>
<title>CSS4 media query test: prefers-contrast.</title>
<style type="text/css">
p { color: black; }

@media (prefers-contrast) {
    #a { color: green; }
}
</style>
</head>
<body>
  <p id="a"></p>
  <p>Before was: <span id="before">rgb(0, 0, 0)</span> - should be rgb(0, 0, 0)</p>
  <p>After was: <span id="after">rgb(0, 128, 0)</span> - should be rgb(0, 128, 0)</p>
</body>
</html>
