Board Thread:Support Requests - Designing Your Wikia/@comment-31924693-20151217014636/@comment-3474542-20151217063826

RobertATfm wrote: ... 2) Is there any way to set my personal CSS to force zero transparency on wikis where the transparency has been set too high for me? Yes! You will need to set the opacity property for any element that you find to be too transparent (you may need to use "!important" to force the page to use your settings). You may need to experiment a bit to find all of the places that opacity is customized, but typically, transparency will use a setting similar to this one: div {    opacity: 0.4; }

Where 1 is 100% opaque, .5 is 50% transparent, and 0 is 100% transparent. If a site is using .js to change the transparency (usually via animation) of an item, you may also need to change your personal .js page to overide their settings.

You can read more about using CSS to change opacity at this page