For those who don’t know, try it in Settings (top right of this forum screen).
Colours are not the best IMHO but at least it’s not white.
Tis hard for me to read the dark version. I prefer the original. 
Same, especially when it comes to read topic names
I switched to the dark version myself 
haha. Easier on the eyes
Somehow my eyes are sensitive, friends or colleagues come over and look at my screen and say, “How do you even see anything?” because I have the brightness always turned way, way down.