<!doctype html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <title>Gradient in LCH space</title>
    <link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
    <style>
        body {
            background: #fff;
        }

        div {
            width: 200px;
            height: 100px;
            margin: 10px;
        }

        div.a {
            background-image: linear-gradient(to right in lch increasing hue,
                                              lch(50% 100% 0d