[css-color-4] Clarify interpolation of legacy sRGB

Author: svgeesus

css-color-4/Overview.bs

@@ -4394,9 +4394,11 @@ Color space for interpolation</h3>
 	The host syntax may define what the default interpolation space should be for each case,
 	and optionally provide syntax for authors to override this default.
 
-	If the host syntax does not define what color space interpolation should take place in,
-	it defaults to Lab. In that case, user agents may handle interpolation
-	<!-- is that realy a MAY ? -->
+	If the host syntax does not define what color space
+	interpolation should take place in,
+	it defaults to Lab.
+
+	However, user agents will handle interpolation
 	between legacy sRGB color formats
 	(hex colors, named colors,
 	''rgb()'', ''hsl()'' or ''hwb()''
@@ -4410,6 +4412,7 @@ Color space for interpolation</h3>
 	Issue(5928):
 
 
+
 <h3 id="interpolation-alpha">
 Interpolating with alpha</h3>