AccentColor change (#12733)

Author: alisonmaher

css-color-4/Overview.bs

@@ -41,6 +41,8 @@ spec: css-backgrounds-3; type: property; text: border-top-color
 spec: css-backgrounds-3; type: property; text: border-left-color
 spec: css-backgrounds-3; type: property; text: border-bottom-color
 spec: css-backgrounds-3; type: property; text: border-right-color
+spec: css-ui-4;	type: dfn; text: accent color
+spec: css-ui-4; type: property; text: accent-color
 </pre>
 
 
@@ -2020,6 +2022,13 @@ System Colors</h3>
 	though possibly at a lower contrast rating,
 	over any of the backgrounds.
 
+	To maintain consistency with widget [=accent color=] styling,
+	''AccentColor'' takes its value from 'accent-color',
+	unless [=Forced Colors Mode=] is enabled.
+	''AccentColorText'' takes its value from
+	the contrasting foreground color to ''AccentColor''
+	as is described for widget [=accent color=] styling.
+
 	<div class="example" id="ex-SystemCombo">
 		For example, the system color combinations in the browser you are currently using:
 
@@ -7337,8 +7346,8 @@ Changes</h2>
 <h3 id="changes-from-20250424">Changes since the 
 	<a href="https://www.w3.org/TR/2025/CRD-css-color-4-20250424/">Candidate Recommendation Draft of 24 April 2025</a></h3>
 <ul>
-	<!-- to 23 Apr 2025 -->
-	<li><em>none</em></li>
+	<!-- to 4 Sep 2025 -->
+	<li>Updated ''AccentColor'' to take its value from 'accent-color', unless in [=Forced Colors Mode=]</li>
 </ul>
 
 <h3 id="changes-from-20240213">Changes since the <a href="https://www.w3.org/TR/2024/CRD-css-color-4-20240213/">Candidate Recommendation Draft of 13 Feb 2024</a></h3>