<style>
body {
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 10"><g fill="#ccc"><rect width="5" height="5"/><rect x="5" y="5" width="5" height="5"/></g></svg>');
    background-size: 100px 100px;
}
.box {
    display: inline-block;
    width: 80px;
    height: 80px;
}
</style>
<p>These two rows should be identical</p>
<div class="box" style="background: linear-gradient(red, blue);"></div>
<!-- Floating point rounding means we can't use this in a ref test without some tolerance -->
<!-- <div class="box" style="background: linear-gradient(red, rgba(0, 0, 255, 0.5));"></div> -->
<div class="box" style="background: linear-gradient(red, blue, green, cyan);"></div>
<div class="box" style="background: linear-gradient(to bottom right, red, blue);"></div>
<div class="box" style="background: linear-gradient(to bottom left, rgba(255, 0, 0, 0.6), rgba(0, 0, 255, 0.6));"></div>

<br>

<div class="box" style="background: linear-gradient(color(srgb 1 0 0), blue);"></div>
<!-- Floating point rounding means we can't use this in a ref test without some tolerance -->
<!-- <div class="box" style="background: linear-gradient(red, color(srgb 0 0 1 / 0.5));"></div> -->
<div class="box" style="background: linear-gradient(red, color(srgb 0 0 1), green, color(srgb 0 1 1));"></div>
<div class="box" style="background: linear-gradient(to bottom right, color(srgb 1 0 0), color(srgb 0 0 1));"></div>
<div class="box" style="background: linear-gradient(to bottom left, color(srgb 1 0 0 / 0.6), color(srgb 0 0 1 / 0.6));"></div>

<br>

<p>These two rows should be identical</p>
<div class="box" style="background: radial-gradient(green, yellow);"></div>
<!-- Floating point rounding means we can't use this in a ref test without some tolerance -->
<!-- <div class="box" style="background: radial-gradient(orange, rgba(0, 0, 255, 0.5));"></div> -->
<div class="box" style="background: radial-gradient(red, blue, green, cyan);"></div>
<!-- Floating point rounding means we can't use this in a ref test without some tolerance -->
<!-- <div class="box" style="background: radial-gradient(circle at top right, orange, purple);"></div> -->

<br>

<div class="box" style="background: radial-gradient(color(srgb 0 0.5 0), color(srgb 1 1 0));"></div>
<!-- Floating point rounding means we can't use this in a ref test without some tolerance -->
<!-- <div class="box" style="background: radial-gradient(orange, color(srgb 0 0 1 / 0.5));"></div> -->
<div class="box" style="background: radial-gradient(red, color(srgb 0 0 1), green, color(srgb 0 1 1));"></div>
<!-- Floating point rounding means we can't use this in a ref test without some tolerance -->
<!-- <div class="box" style="background: radial-gradient(circle at top right, orange, color(srgb 0.5 0 0.5));"></div> -->