some fixes to black colorscheme

app/assets/stylesheets/highlight.black.css.scss

@@ -33,11 +33,11 @@
   .s { color: #dd2200; background-color: transparent } /* Literal.String */
   .highlight .na{color:#008080;} /* Name.Attribute */
   .highlight .nb{color:#0086B3;} /* Name.Builtin */
-  .highlight .nc{color:#4d3;font-weight:bold;} /* Name.Class */
+  .highlight .nc{color:#ccc;font-weight:bold;} /* Name.Class */
   .highlight .no{color:turquoise;} /* Name.Constant */
   .highlight .ni{color:#800080;}
   .highlight .ne{color:#900;font-weight:bold;} /* Name.Exception */
-  .highlight .nf{color:aqua;font-weight:bold;} /* Name.Function */
+  .highlight .nf{color:#ccc;font-weight:bold;} /* Name.Function */
   .highlight .nn{color:#79C3E0;font-weight:bold;} /* Name.Namespace */
   .highlight .nt{color:#fc5;} /* Name.Tag */
   .highlight .nv{color:#008080;} /* Name.Variable */

app/helpers/projects_helper.rb

@@ -16,11 +16,12 @@ module ProjectsHelper
     nil
   end
 
+  # expires in 360 days
   def switch_colorscheme_link(opts)
     if cookies[:colorschema].blank?
-      link_to_function "paint it black!", "$.cookie('colorschema','black'); window.location.reload()", opts
+      link_to_function "paint it black!", "$.cookie('colorschema','black', {expires:360}); window.location.reload()", opts
     else
-      link_to_function "paint it white!", "$.cookie('colorschema',''); window.location.reload()", opts
+      link_to_function "paint it white!", "$.cookie('colorschema','', {expires:360}); window.location.reload()", opts
     end
   end
 end