[css-color-4][css-color-5] Define absolute colors in prose, w3c#9555

Author: svgeesus

css-color-4/Overview.bs

@@ -915,14 +915,22 @@ Representing Colors: the <<color>> type</h2>
 	Colors in CSS are represented by the <dfn export><<color>></dfn> type:
 
 	<pre class='prod'>
-	&lt;color> = <<absolute-color-base>> | currentcolor | <<system-color>> <!-- | <<device-cmyk()>> -->
-
-	<dfn export>&lt;absolute-color-base></dfn> = <<hex-color>> | <<absolute-color-function>> | <<named-color>> | transparent
-	<dfn export>&lt;absolute-color-function></dfn> = <<rgb()>> | <<rgba()>> |
-	                            <<hsl()>> | <<hsla()>> | <<hwb()>> |
-	                            <<lab()>> | <<lch()>> | <<oklab()>> | <<oklch()>> |
-	                            <<color()>>
-	</pre>
+		&lt;color> = <<color-base>> | currentColor | <<system-color>> 
+	
+		<dfn>&lt;color-base></dfn> = <<hex-color>> | <<color-function>> | <<named-color>> | transparent
+		<dfn>&lt;color-function></dfn> = <<rgb()>> | <<rgba()>> |
+									<<hsl()>> | <<hsla()>> | <<hwb()>> |
+									<<lab()>> | <<lch()>> | <<oklab()>> | <<oklch()>> |
+									<<color()>>
+		</pre>
+	
+		An <dfn export>absolute color</dfn>
+		is a <<color>> whose computed value
+		has an absolute, colorimetric interpretation.
+		This means that the value is not:
+	
+		* ''currentColor'' (which depends on the value of the 'color' property)
+		* a <<system-color>> (which depends on the color mode)
 
 	The <<hsl()>>, <<hsla()>>, <<hwb()>>, <<lch()>>, and <<oklch()>> [=color functions=]
 	are [=cylindrical polar color=] representations using a <<hue>> angle;

css-color-5/Overview.bs

@@ -124,15 +124,29 @@ Introduction {#intro}
 	Colors in CSS are represented by the <dfn export><<color>></dfn> type:
 
 	<pre class='prod'>
-	&lt;color> = <<absolute-color-base>> | currentcolor | <<system-color>> | <<device-cmyk()>> | <<color-mix()>> | <<light-dark()>>
+	&lt;color> = <<color-base>> | currentColor | <<system-color>> | <<device-cmyk()>>  | <<light-dark()>>
 
-	<dfn>&lt;absolute-color-base></dfn> = <<hex-color>> | <<absolute-color-function>> | <<named-color>> | transparent
-	<dfn>&lt;absolute-color-function></dfn> = <<rgb()>> | <<rgba()>> |
+	<dfn>&lt;color-base></dfn> = <<hex-color>> | <<color-function>> | <<named-color>> | <<color-mix()>> | transparent
+	<dfn>&lt;color-function></dfn> = <<rgb()>> | <<rgba()>> |
 								<<hsl()>> | <<hsla()>> | <<hwb()>> |
 								<<lab()>> | <<lch()>> | <<oklab()>> | <<oklch()>> |
 								<<color()>>
 	</pre>
 
+	An <dfn export>absolute color</dfn>
+	is a <<color>> whose computed value
+	has an absolute, colorimetric interpretation.
+	This means that the value is not:
+
+	* ''currentColor'' (which depends on the value of the 'color' property)
+	* a <<system-color>> (which depends on the color mode)
+	* <<light-dark()>> (which depends on the color mode)
+	* <<device-cmyk()>> (which has no colorimetric basis)
+
+	Nor are any of those values used inside <<color-mix()>> 
+	or in relative color syntax.
+
+
 
 <!--
 ██     ██ ████ ██     ██