[css-color-5] Specified value of color mix serializes with specified, not normalized, percentages w3c#8564

Author: svgeesus

css-color-5/Overview.bs

@@ -2592,14 +2592,32 @@ followed by the specified <<color-space>> in all-lowercase,
 followed by ", ",
 followed by the first specified color,
 followed by a space,
-followed by the normalized first percentage,
+followed by the specified (un-normalized) first percentage (unless that is 50%),
 followed by ", ",
 followed by the second specified color,
+followed by the specified (un-normalized) second percentage 
+(unless either that is 50%, or the two specified percentages add to 100%),
 followed by ")".
 
 Following the principle of shortest serialization,
-and given that the normalized percentages are serialized,
-the normalized second percentage is omitted.
+the second percentage is typically omitted,
+even if explicitly specified.
+
+<div class="example" id="ex-serial-specified-mix">
+	For example, the serialized specified value of 
+	<pre>color-mix(in oklab, teal, peru 40%)</pre>
+	would be the string "color-mix(in oklab, teal 60%, peru)".
+
+	The serialized specified value of 
+	<pre>color-mix(in oklab, teal 50%, peru 50%)</pre>
+	would be the string "color-mix(in oklab, teal, peru)".
+
+	The serialized specified value of 
+	<pre>color-mix(in oklab, teal 70%, peru 70%)</pre>
+	would be the string "color-mix(in oklab, teal 70%, peru 70%)"
+	because the fact that these normalize to 50% each
+	is only discoverfed after percentage normalization.
+</div>
 
 The serialization of the result of a ''color-mix()'' function
 is a <<color>>,
@@ -2608,7 +2626,7 @@ The form used
 depends on the color space specified with "in".
 
 <wpt>
-
+	parsing/color-valid-color-mix-function.html
 </wpt>
 
 The <em>minimum</em> precision for round-tripping