Is your feature request related to a problem? Please describe.
The main issue is when you're working/managing a server at night the white background causes a lot of distress on your eyes.
Describe the solution you'd like
A switch that is located on the navigation bar to change the white background (in the content section) to a dark shade of gray (such as #151515 to distinguish it from the server console and such).
Describe alternatives you've considered
I have not considered any alternative solutions to this problem.
Additional context

A browser extension such as DarkReader is a good temporary solution to this.

Pterodactyl should implement DarkReader into the panel directly that's would be cool!
There's a bunch of alternatives already for this.
I even have one for 0.6 (0.7 is private to dino.gg atm, but its super easy to fix up some stuff on 0.7)
https://github.com/Lunaversitay/pterodactyl-skins
Found these with a quick google search: https://github.com/TheFonix/Pterodactyl-Themes
Also @ZeProf2Code I don't think darkreader is "implementable" it seems like just a browser extension.
I don't have plans to implement dual themes, people are welcome to maintain their own versions, and this should be even easier with a more unified design system available in 0.8.
Most helpful comment
A browser extension such as DarkReader is a good temporary solution to this.
