Update documentation.css

Author: ocots

assets/css/documentation.css

@@ -1,6 +1,9 @@
 @import "common.css";
 @import "multidoc.css";
 
+h2 {color:#007fa2;}
+h3 {color:#E39912;}
+
 /*! do not display global search bar from MultiDocumenter in the nav menu */
 #multi-page-nav .search {
     display: none!important;