Ticket #61846: 61846.1.patch

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

@@ -263 +263 @@
         color: #7c7c7c;
 }
 
+.is-style-outline .wp-block-button__link,
+.is-style-outline .wp-block-button__link:visited {
+        color: currentColor;
+}
+
 .wp-block-button.is-style-outline .wp-block-button__link,
 .wp-block-button.is-style-outline .wp-block-button__link:visited {
         background-color: inherit;