[css-color-4] beginning of the end of per-component clipping

Author: svgeesus

css-color-4/Overview.bs

@@ -2157,6 +2157,12 @@ Profiled, Device-dependent Colors</h2>
 				where the additional inks are spot colors or varnishes
 				that most colors on the page won't use.)
 
+				Values less than 0 or 0%, or greater than 1 or 100%,
+				are not invalid; instead, they are
+				<a>gamut-mapped</a> using a relative colorimetric intent
+				which brings the values within the range 0/0% to 1/100%
+				at computed-value time.
+
 				If a <<string>> is provided,
 				this argument represents an <a>invalid color</a>.
 			<dt>If the colorspace defines named colors