I have my Edge browser set to "Dark Mode" so that many of the web pages I visit daily have dark grey backgrounds with white text. I think it's MUCH easier to read, is easier on my eyes and it darkens the entire room. My wife can't get sleep if I have my laptop on as she's trying to drift off, so I end up shutting down before I'd like to.
I don't know what's involved with setting up a feature like this, but if it's possible with the CCF forum software, I would love to see it and if you don't like it, you can always go back to light mode with a couple of mouse clicks.