[css-color-4] Listed categories of colors, such as those that resolve to sRGB or support legacy color syntax. Fix #7836

Author: svgeesus

css-color-4/Overview.bs

@@ -971,6 +971,19 @@ Representing Colors: the <<color>> type</h2>
 		* ''currentColor'' (which depends on the value of the 'color' property)
 		* a <<system-color>> (which depends on the color mode)
 
+	The colors that <dfn export>resolve to sRGB</dfn> are:
+
+	- <a href="#hex-notation">hex</a> colors
+	- ''rgb()'' and ''rgba()'' values
+	- ''hsl()'' and ''hsla()'' values
+	- ''hwb()'' values
+	- <a href="#named-colors">named</a> colors
+
+	The functions that <dfn export>support legacy color syntax</dfn> are:
+
+	- ''rgb()'' and ''rgba()''
+	- ''hsl()'' and ''hsla()''
+	
 	The <<hsl()>>, <<hsla()>>, <<hwb()>>, <<lch()>>, and <<oklch()>> [=color functions=]
 	are [=cylindrical polar color=] representations using a <<hue>> angle;
 	the other [=color functions=] use [=rectangular orthogonal color=] representations.