Add color setting for disabled tabs

web/app/templates/nopaque.html.j2

@@ -69,6 +69,8 @@
   main .pagination li.active {background-color: {{ scheme_primary_color }};}
   main .table-of-contents a.active {border-color: {{ scheme_primary_color }};}
   main .tabs .tab a {color: inherit;}
+  main .tabs .tab.disabled a {color: {{ scheme_primary_color }}28;}
+  main .tabs .tab.disabled a:hover {color: {{ scheme_primary_color }}28;}
   main .tabs .tab a:hover {color: {{ scheme_primary_color }};}
   main .tabs .tab a.active, .tabs .tab a:focus.active {
     color: {{ scheme_primary_color }};