Board Thread:Support Requests - Getting Technical/@comment-32783766-20200222022204/@comment-43707041-20200227124530

something like this should work. a[href$=":Lambsskin"], a[href$="/wiki/User:Lambsskin"], a[href="/wiki/Message_Wall:Lambsskin"], a[href="/wiki/User_blog:Lambsskin"], a[href="/wiki/Special:Contributions/Lambsskin"] { color: color !important; font: bold Helvetica, Arial, Sans-Serif !important; }

It will change their (in this case, your) username colors everywhere - even their username links that point to a different wiki.