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<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Reference Test</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
<style>
div
{
font-size: 40px;
line-height: 1;
}
/*
For text, the corresponding overlay must cover at least
the entire em box and may extend further above/below the
em box to the line box edges.
*/
span
{
background-color: Highlight;
color: HighlightText;
}
</style>
<div><span>With system-color-highlight</span></div>
<div><span>With getSelection()</span><br></div>