Ticket #58509: 58509.1.patch

src/wp-content/themes/twentyfourteen/css/blocks.css

@@ -157 +157 @@
         background-color: #55d737;
 }
 
+.widget .wp-block-file .wp-block-file__button,
+.widget .wp-block-file .wp-block-file__button:hover {
+        color: #fff;
+}
+
 /*--------------------------------------------------------------
 3.0 Blocks - Formatting
 --------------------------------------------------------------*/
@@ -263 +268 @@
         background-color: #55d737;
 }
 
+.widget a.wp-block-button__link:not(.has-text-color),
+.widget a.wp-block-button__link:not(.has-text-color):hover {
+        color: #fff;
+}
+
 /* Separator */
 
 .wp-block-separator {