Board Thread:Support Requests - Designing Your Wikia/@comment-24096935-20150104231931/@comment-4189499-20150108200831

So you want to make style changes to that bar? That can be done through CSS. Having a quick look at their CSS, I think the command controlling the navbar is the one which says the following:

.mw-specialpagesgroup, .skin-oasis #edit_enhancements_toolbar, .tools-menu, .AccountNavigation .subnav, .GlobalNavigation .subnav, .WikiHeader .subnav, .WikiaArticleCategories, .toc, .module, .WikiaSearch input[type="text"], .tooltip:hover span, table.wikitable { border: 1px solid #250000 !important; color: #fff; background-image:url("http://img1.wikia.nocookie.net/__cb20140926205605/reign-cw/images/6/6a/Reignhsnew.png") !important; -webkit-border-radius:4px; -moz-border-radius:4px; border-radius:4px; box-shadow: 0 0 4px #250000; -moz-box-shadow: 0 0 4px #250000; -webkit-box-shadow: 0 0 4px #250000; }

Copy that into your wiki's MediaWiki:Wikia.css and tell me if it works.