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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Color 4: The RGB hexadecimal notations: #RRGGBB</title>
<link rel="author" title="Chris Lilley" href="">
<link rel="help" href="">
<link rel="match" href="greensquare-ref.html">
<meta name="assert" content="6 digit hex">
.test { background-color: red; width: 12em; height: 6em; margin-top:0}
.ref { background-color: #008000; width: 12em; height: 6em; margin-bottom: 0}
.test {background-color: #008000}
<p>Test passes if you see a green square, and no red.</p>
<p class="ref"> </p>
<p class="test"> </p>