Rebalance: Improve Caption Readability

rebalance/blocks.css

@@ -21,7 +21,7 @@ Description: Used to style Gutenberg Blocks.
 /* Captions */
 
 [class^="wp-block-"] figcaption {
-	color: #999;
+	color: inherit;
 	font-size: 14px;
 	line-height: 1.525em;
 	text-align: center;