Update css-color-4/Overview.bs

Co-authored-by: Chris Lilley <chris@w3.org>

Author: romainmenke

css-color-4/Overview.bs

@@ -1294,7 +1294,7 @@ will have a [=powerless=] hue component.
 	as a result, the hue component is [=powerless=].
 
 	When changing a powerless hue component to a [=missing component=],
-	the chroma (or other measure of colorfulness, such as saturation in ''hsl'') is set to zero
+	the chroma (or other measure of colorfulness, such as saturation in ''hsl''; see [=analogous components=]) is set to zero
 	to avoid amplifying floating-point noise.
 	In the case of ''hwb'' set ''b'' to ''100 - w'' or if either ''b'' or ''w'' is missing set the other component to ''100''.