[css-color-4] Rename Text to CanvasText #4465

Author: fantasai

css-color-4/Overview.bs

@@ -757,7 +757,7 @@ System Colors</h3>
 	<dl id="system-color-values" data-dfn-type="value" dfn-for="<system-color>">
 		<dt><dfn>Canvas</dfn>
 		<dd>Background of application content or documents.
-		<dt><dfn>Text</dfn>
+		<dt><dfn>CanvasText</dfn>
 		<dd>Text in application content or documents.
 		<dt><dfn>LinkText</dfn>
 		<dd>Text in non-active, non-visited links.
@@ -796,7 +796,7 @@ System Colors</h3>
 	The following pairings are expected to form legible background-foreground colors:
 
 	<ul id=system-color-pairs>
-		* ''Canvas'' background with ''Text'', ''LinkText'', ''VisitedText'', ''ActiveText'' foreground.
+		* ''Canvas'' background with ''CanvasText'', ''LinkText'', ''VisitedText'', ''ActiveText'' foreground.
 		* ''ButtonFace'' background with ''ButtonText'' foreground.
 		* ''Field'' background with ''FieldText'' foreground.
 		* ''Highlight'' background with ''HighlightText'' foreground.