If you would like to have a dark theme for the site. Then the first thing you need to do is install the browser addon named Stylus. Click on the links below for which browser you want to install it on.
Once you have that installed you can do one of three things to get the dark theme installed.
1. Go to my Allakhazam Dark Theme by gidono page and click on Install for the Everquest Allakhazam Dark Theme.