Thread:Zophi/@comment-27178869-20140718071420/@comment-24584873-20140718154859

.toc { border: 3px solid teal !important; } You can change '3px' to the thickness you want and 'teal' to any color you want. (or just remove the color if you don't want any)

Also, this code needs to be put into MediaWiki:Common.css