I will add that the
BPIP extension, among a lot of other enhancements made for this forum, also has themes, and the "Dark purple" is a pretty good dark theme imho.
Interesting, I wasn't aware of that (though I don't visit the BPIP site all that often).
OP, I'm not sure what browser you're using but if you've got a dark mode for it, it should work for bitcointalk, right? I've been using the Dark Reader extension for a while now, and it works just fine on the forum. I'm not sure what else you're looking for if you've already got a similar add-on.
By the way, this has been brought up before like a million times and I'm pretty sure Theymos isn't inclined to make a dark mode specially for bitcointalk, at least not until that new forum software comes out in the year 3093--so you might have to wait a while. If you're lucky, you can be melted out of your cryogenic freezer and find that this forum looks slightly different and
might have a dark mode option. See you then, eh?