Index: wp-content/themes/twentyten/editor-blocks.css
===================================================================
--- wp-content/themes/twentyten/editor-blocks.css	(revision 53805)
+++ wp-content/themes/twentyten/editor-blocks.css	(working copy)
@@ -167,6 +167,10 @@
 	padding: 0 3em;
 }
 
+.editor-styles-wrapper blockquote * {
+	color: inherit;
+}
+
 /* Table styles */
 
 .editor-block-list__block tr th,