[css-color-4] Clarify that resolving sRGB values does not apply to the color() function

Author: svgeesus

css-color-4/Overview.bs

@@ -5566,6 +5566,10 @@ Resolving sRGB values</h3>
 	* [=system colors=]
 	* <a href="#deprecated-system-colors">deprecated-colors</a>
 
+	It does <em>not</em> apply to:
+
+	* ''color()'' values using the ''srgb'' or ''srgb-linear'' [=color space=]s.
+
 	If the sRGB color was explicitly specified by the author as a [=named color=],
 	or as a [=system color=],
 	the [=specified value=] is that named or system color, converted to