Board Thread:Support Requests - Designing Your Wikia/@comment-25386934-20151217033845

I've been using CSS to customize a tabber.

Everything about is seems great expect for the fact that the two sides and bottom of the tabber are gray, and I want them transparent.

You can see my issue here, along with a copy of the CSS I am using.

Does anyone know how to make it transparent? Help is appreciated, and thanks in advance. 