diff --git a/css/at-rules.json b/css/at-rules.json
index 30dc981d..4b4a6b03 100644
--- a/css/at-rules.json
+++ b/css/at-rules.json
@@ -147,7 +147,7 @@
         "status": "standard"
       },
       "override-colors": {
-        "syntax": "[ <integer [0,∞]> <absolute-color-base> ]#",
+        "syntax": "[ <integer [0,∞]> <color> ]#",
         "media": "all",
         "initial": "n/a (required)",
         "percentages": "no",