Index: src/wp-admin/css/colors/_admin.scss
===================================================================
--- src/wp-admin/css/colors/_admin.scss	(revision 26808)
+++ src/wp-admin/css/colors/_admin.scss	(working copy)
@@ -445,12 +445,17 @@
 	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 {