Crat Highlighter (source code) adds a highlighted background to links leading to a user, user talk, or contribs page for: sysops, interface admins, checkusers, oversighters, bureaucrats, or ArbCom members.[1] To install it, add {{subst:iusc|User:Amorymeltzer/crathighlighter.js}} to your common.js or skin-specific javascript page and clear your cache.