Board Thread:Support Requests - Getting Started/@comment-38582925-20191011082903

I dont know if this is 'multiple themes' or what but i really want to create a wiki that has many themes for specific pages. Check out this Wiki: https://hollowknight.fandom.com/wiki/Hollow_Knight_Wiki. The color is mainly Black or gray and the bluish background, but if you go to the Godmaster or The Grimm Troupe page on that wiki, everything changes, like the backgrounds, fonts' colors, etc,... How do i do that??? (sorry for my english) 