If you're like me, you may have spent the last few months looking hopelessly and blindly at bright white backgrounds on the pages of this Fandom site. Unbeknown to me (until now), I could revert the pages back to what they looked like previously with just a few simple clicks of a button. For those that don't know, you can do the following:
Go to your profile picture in the bottom left hand corner of the screen, and then click on "My Preferences". Open the "Appearance" tab and scroll down to the "FandomDesktop" section. Under "Theme", select "Dark" as opposed to "Light".
And voilà, it is back to the old look! There are of course a bunch of other options available as well to personalize your viewing experience.