09-gradients/linear-gradients-coincident-color-stops.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>The effect of coincident, or “hard”, color stops</title>
<style type="text/css">
body {padding: 1em;}
section {background: gold; position: relative; padding: 25px; height: 25px; width: 800px;}
	#spectrum {background-image: linear-gradient(90deg,
		red 0%, orange, yellow, green 50%, blue 50%, indigo, violet);}
b {position: absolute; top: 0%;
	font: 12px Helvetica, monospace; text-align: center; text-indent: 0.5em;
	width: 3.5em; margin-left: -1.75em; margin-top: 75px; padding-top: 1.25em;
	background: linear-gradient(to right,
		transparent, transparent 50%,
		black 50%, black 52%,
		transparent 52%);
	background-size: 100% 1em;
	background-repeat: no-repeat;}
.p00 {left: 0;}
.p16 {left: 16.67%;}
.p33 {left: 33.33%;}
.p50 {left: 50%;}
.p75 {left: 75%;}
.p100 {left: 99.9%;}
</style>
</head>
<body>

<section id="spectrum">

<div id="ex01">
<b class="p00">0% red</b>
<b class="p16">16.7% orange</b>
<b class="p33">33.3% yellow</b>
<b class="p50">50% green blue</b>
<b class="p75">75% indigo</b>
<b class="p100">100% violet</b>
</div>

</section>

</body>
</html>