Index: wp-content/themes/twentytwentyone/assets/css/style-editor.css
===================================================================
--- wp-content/themes/twentytwentyone/assets/css/style-editor.css	(revision 53101)
+++ wp-content/themes/twentytwentyone/assets/css/style-editor.css	(working copy)
@@ -1561,7 +1561,7 @@
 }
 
 .wp-block-quote .wp-block-quote__citation {
-	color: var(--global--color-primary);
+	color: currentColor;
 	font-size: var(--global--font-size-xs);
 	font-style: var(--quote--font-style-cite);
 }
Index: wp-content/themes/twentytwentyone/assets/sass/05-blocks/quote/_editor.scss
===================================================================
--- wp-content/themes/twentytwentyone/assets/sass/05-blocks/quote/_editor.scss	(revision 53101)
+++ wp-content/themes/twentytwentyone/assets/sass/05-blocks/quote/_editor.scss	(working copy)
@@ -23,7 +23,7 @@
 	}
 
 	.wp-block-quote__citation {
-		color: var(--global--color-primary);
+		color: currentColor;
 		font-size: var(--global--font-size-xs);
 		font-style: var(--quote--font-style-cite);