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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Direction of hue interpolation</title>
<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
<link rel="help" href="https://www.w3.org/TR/css-color-4/#interpolation">
<meta name="assert" content="Tests that increasing/decreasing hue directions match shorter/longer as appropriate">
<link rel="match" href="gradient-hue-direction-ref.html">
<style>
body {
background: #fff;
}
div {
width: 200px;
height: 50px;
margin: 10px;
}
div.a1 {
background-image: linear-gradient(to right in hsl increasing hue, red, orange);
}
div.a2 {
background-image: linear-gradient(to right in hsl shorter hue, red, orange);
}
div.b1 {
background-image: linear-gradient(to right in hsl decreasing hue, red, orange);
}
div.b2 {
background-image: linear-gradient(to right in hsl longer hue, red, orange);
}
div.c1 {
background-image: linear-gradient(to right in lch increasing hue, red, orange);
}
div.c2 {
background-image: linear-gradient(to right in lch shorter hue, red, orange);
}
div.d1 {
background-image: linear-gradient(to right in lch decreasing hue, red, orange);
}
div.d2 {
background-image: linear-gradient(to right in lch longer hue, red, orange);
}
</style>
</head>
<body>
<p>Each pair of gradients should match:</p>
<div class=a1></div>
<div class=a2></div>
<hr>
<div class=b1></div>
<div class=b2></div>
<hr>
<div class=c1></div>
<div class=c2></div>
<hr>
<div class=d1></div>
<div class=d2></div>
</body>
</html>
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