 20px;
  row-gap: 10px
  height: 100px;
  background-color: black;
  color: orange;
  row-rule-style: solid;
  row-rule-width: 10px;
  row-rule-color: yellow;
}
</style>
<body>
<script>
test_interpolation({
  property: 'row-rule-color',
  from: neutralKeyframe,
  to: 'lime',
}, [
  {at: -5, expect: 'rgb(255, 255, 0)'},
  {at: -0.4, expect: 'rgb(255, 255, 0)'},
  {at: 0, expect: 'rgb(255, 255, 0)'},
  {at: 0.2, expect: 'rgb(204, 255, 0)'},
  {at: 0.6, expect: 'rgb(102, 255, 0)'},
  {at: 1, expect: 'rgb(0, 25