Index: wp-content/themes/twentyeleven/blocks.css
===================================================================
--- wp-content/themes/twentyeleven/blocks.css	(revision 53605)
+++ wp-content/themes/twentyeleven/blocks.css	(working copy)
@@ -217,6 +217,7 @@
 	font-weight: bold;
 	padding: 6px 10px 6px 0;
 	text-transform: uppercase;
+	color: inherit;
 }
 
 .wp-block-table td {
Index: wp-content/themes/twentyeleven/editor-blocks.css
===================================================================
--- wp-content/themes/twentyeleven/editor-blocks.css	(revision 53605)
+++ wp-content/themes/twentyeleven/editor-blocks.css	(working copy)
@@ -358,6 +358,7 @@
 .editor-block-list__block .wp-block-table th,
 .editor-block-list__block .wp-block-table td {
 	padding: 0;
+	color: inherit;
 }
 
 .wp-block-table__cell-content {