The current dark mode is very blue-ish and has a good amount of contrast issues. For example, I found that in dark mode, all text is set to RGB(240,240,240) instead of 255,255,255 making text harder to read.
This should honestly be part of the main application. The current app looks weird, especially when all other apps do not have a blue tone.
I created this Arc Browser boost with custom CSS for anyone that wants to try it out: https://arc.net/boost/AF50E5BF-528D-4B4A-A055-83B8DC120F87 (Edited: Updated with some fixes)
(only works on Arc Browser, and I didn't figure out how to change the colors of some UI components in Docs)