Upvoting because I don't think accessibility issues should be handled with "well just adjust with CSS." There are plenty of folks who don't want to touch code period, and having more customization when it comes to these issues would be helpful.
You can easily adjust this with CSS. As @Hanhula said, go into the Discord server and look at the CSS help.
Don't see this happen, because the majority of users doesn't have issues with the color scheme. Seems to be a rather rare use-case. I've raised that issue a while back (though on light mode, because it still is black background, white writing which is anything but LIGHT). But I'd be all for customization. I am currently using the Stylus Browser-Addon to set the colors manually and reduce the massive eye-strain it does give me. Feel free to contact me if you need the CSS. @Hanhula: I believe this is the same issue I have and it refers to the backend which I don't think you can style with CSS without using a broswer-Addon?
You can already do this with CSS. Please come into the Discord and discuss with us if you need help doing it!
I don't know anything about the behind the scenes tinkering that would need to happen to make this viable, but I agree that being able to even just have a slider bar to tone the bright white to a darker grey would be nice.