1 files changed, 5 insertions, 1 deletions
diff --git a/devtools/server/actors/css-properties.js b/devtools/server/actors/css-properties.js
index d24c133d4..b22d8005f 100644
--- a/devtools/server/actors/css-properties.js
+++ b/devtools/server/actors/css-properties.js
@@ -31,8 +31,12 @@ exports.CssPropertiesActor = ActorClassWithSpec(cssPropertiesSpec, {
   getCSSDatabase() {
     const properties = generateCssProperties();
     const pseudoElements = DOMUtils.getCSSPseudoElementNames();
+    const supportedFeature = {
+      // checking for css-color-4 color function support.
+      "css-color-4-color-function": DOMUtils.isValidCSSColor("rgb(1 1 1 / 100%)"),
+    };
 
-    return { properties, pseudoElements };
+    return { properties, pseudoElements, supportedFeature };
   }
 });