[css-colors-4] serializing the other colors

Author: svgeesus

css-color-4/Overview.bs

@@ -867,6 +867,34 @@ This section updates and replaces that part of CSS Object Model, section
 	the black ("k") color component value
 	from the alpha value.
 
+<h4 id="serializing-other-colors">Serializing other colors</h4>
+
+	This applies to [=system colors=],
+	[=deprecated-colors=],
+	''transparent'', and
+	''currentcolor''.
+
+	The serialized form of these values
+	is derived from the [=computed value=]
+	and uses lowercase letters for the color name.
+
+	<div class="example" id="ex-system-serial">
+		<p>The serialized form of the color</p>
+		<pre class="lang-css"><span class="swatch" style="--color: VisitedText"></span> VisitedText</pre>
+		<p>is the string "visitedtext"</p>
+	</div>
+
+	<div class="example" id="ex-deprecated-serial">
+		<p>The serialized form of the color</p>
+		<pre class="lang-css"><span class="swatch" style="--color: ButtonFace"></span> ThreeDFace</pre>
+		<p>is the string "threedface"</p>
+	</div>
+
+	The serialized form of ''transparent'' is the string "transparent black".
+
+	The serialized form of ''currentColor'' is the string "currentcolor".
+
+
 <h2 id='numeric-srgb'>
 sRGB Colors</h2>