diff --git a/css-color-4/Overview.bs b/css-color-4/Overview.bs
index ad0d6855326..459ec15dfd3 100644
--- a/css-color-4/Overview.bs
+++ b/css-color-4/Overview.bs
@@ -1752,7 +1752,7 @@ Converting LCH colors to Lab colors
Specifying Grays: the ''gray()'' functional notation
- Issue: As decided at San Francisco, this syntax is an alias to Lab with a=b=0.
+ Issue(290):
Grays are fully desaturated colors.
The ''gray()'' functional notation simplifies specifying this common set of colors,