Board Thread:Support Requests - Getting Technical/@comment-9336282-20160701030101/@comment-26437440-20160701081126

If you only want to change the appearance of the Wiki navigation (the one with tabs) that can be fully customized through CSS.

To change the main tabs (On The Wiki, Community, etc)

To change the second part of it (Wiki activity, random page, etc)

You can change the "8px" value to whatever you want. The higher it is, the rounder the edges are.