Ticket #26486: 26486.patch

src/wp-admin/css/colors/_admin.scss

@@ -445 +445 @@
         box-shadow: inset 0 1px 0 lighten( $button-color, 15% ), 0 1px 0 rgba(0,0,0,.15);
 }
 
-/* Thickbox: Install Plugins */
+/* Thickbox: Plugin information */
+
 #sidemenu a.current {
         background: $body-background;
         border-bottom-color: $body-background;
 }
 
+#plugin-information .action-button {
+        background: $button-color;
+}
+
 /* Responsive Component */
 
 div#wp-responsive-toggle a:before {