Board Thread:Support Requests - Getting Technical/@comment-2198466-20180513071119/@comment-23989026-20180513143341

is over-ruling it. I found this in your MediaWiki:Wikia.css

table.wikitable > tr > td, table.wikitable > * > tr > td {background-color:#F2F2F2 !important;} table.wikitable > tr > th, table.wikitable > tr > td, table.wikitable > * > tr > th, table.wikitable > * > tr > td {border:1px solid #869da8 !important;} table.wikitable {color:inherit !important;}

It was added by Katara20 in May 2015. Do you want to remove it from MediaWiki:Wikia.css hoping it does not ruin any of your tables?