[css-color-5] Fix section title, #8841

Author: svgeesus

css-color-5/Overview.bs

@@ -1449,11 +1449,11 @@ The Oklch chroma has dropped from 0.251 to 0.117.
 <!-- Big Text: color() -->
 
 <h2 id="color-function">
-	Specifying Custom Color Spaces: the ''color()'' Function
+	Specifying Predefined and Custom Color Spaces: the ''color()'' Function
 </h2>
 
 	The ''color()'' function allows a color to be specified
-	in a particular, specified [=color space=]
+	in a particular, given [=color space=]
 	(rather than the implicit sRGB color space that most of the other color functions operate in).
 
 	In this level the ''color()'' function is extended
@@ -1462,7 +1462,7 @@ The Oklch chroma has dropped from 0.251 to 0.117.
 
 	It is also extended to allow relative, rather than just absolute, colors.
 
-	Its syntax is extended as follows:
+	Its syntax is now as follows:
 
 	<pre class='prod'>
 		<dfn>color()</dfn> = color( [from <<color>>]? <<colorspace-params>> [ / [ <<alpha-value>> | none ] ]? )