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diff --git a/testing/web-platform/tests/css/css-properties-values-api/animation/custom-property-animation-color-comma-list.html b/testing/web-platform/tests/css/css-properties-values-api/animation/custom-property-animation-color-comma-list.html
new file mode 100644
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+++ b/testing/web-platform/tests/css/css-properties-values-api/animation/custom-property-animation-color-comma-list.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api-1">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../resources/utils.js"></script>
+<div id="target"></div>
+<script>
+
+animation_test({
+  syntax: "<color>#",
+  inherits: false,
+  initialValue: "black"
+}, {
+  keyframes: ["rgb(100, 100, 100), rgb(150, 150, 150)", "rgb(200, 200, 200), rgb(250, 250, 250)"],
+  expected: "rgb(150, 150, 150), rgb(200, 200, 200)"
+}, 'Animating a custom property of type <color>#');
+
+animation_test({
+  syntax: "<color>#",
+  inherits: false,
+  initialValue: "rgb(100, 100, 100), rgb(150, 150, 150)"
+}, {
+  keyframes: "rgb(200, 200, 200), rgb(250, 250, 250)",
+  expected: "rgb(150, 150, 150), rgb(200, 200, 200)"
+}, 'Animating a custom property of type <color># with a single keyframe');
+
+animation_test({
+  syntax: "<color>#",
+  inherits: false,
+  initialValue: "rgb(100, 100, 100), rgb(150, 150, 150)"
+}, {
+  composite: "add",
+  keyframes: ["rgb(25, 25, 25), rgb(50, 50, 50)", "rgb(75, 75, 75), rgb(100, 100, 100)"],
+  expected: "rgb(150, 150, 150), rgb(225, 225, 225)"
+}, 'Animating a custom property of type <color># with additivity');
+
+animation_test({
+  syntax: "<color>#",
+  inherits: false,
+  initialValue: "rgb(100, 100, 100), rgb(150, 150, 150)"
+}, {
+  composite: "add",
+  keyframes: "rgb(50, 50, 50), rgb(100, 100, 100)",
+  expected: "rgb(125, 125, 125), rgb(200, 200, 200)"
+}, 'Animating a custom property of type <color># with a single keyframe and additivity');
+
+animation_test({
+  syntax: "<color>#",
+  inherits: false,
+  initialValue: "black"
+}, {
+  iterationComposite: "accumulate",
+  keyframes: ["rgb(0, 0, 0), rgb(0, 0, 0)", "rgb(50, 50, 50), rgb(100, 100, 100)"],
+  expected: "rgb(125, 125, 125), rgb(250, 250, 250)"
+}, 'Animating a custom property of type <color># with iterationComposite');
+
+discrete_animation_test("<color>#", 'rgb(255, 0, 0), rgb(0, 255, 0)', 'rgb(0, 0, 255)', 'Animating a custom property of type <color># with different lengths is discrete');
+
+</script>