[css-color-4] Clarity on clamping

Author: svgeesus

css-color-4/Overview.bs

@@ -5264,7 +5264,8 @@ Resolving sRGB values</h3>
 
 	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 all lowercase.
+	the [=specified value=] is that named or system color, converted to 
+	<a href="https://infra.spec.whatwg.org/#ascii-lowercase">ASCII lowercase</a>.
 
 	<div class="example" id="ex-named-case">
 			<p>The author-provided mixed-case form below has a specified value in all lowercase.</p>
@@ -5294,6 +5295,7 @@ Resolving sRGB values</h3>
 	Otherwise, the specified, computed and used value
 	is the corresponding sRGB color,
 	paired with the specified alpha channel
+	(after clamping to [0.0, 1.0])
 	and defaulting to opaque if unspecified).
 
 	<wpt>