hmm? What device are you using?

On windows:

settings, then Dark Mode should be on the bottom left. 

i

You have 8.4 version. In 8.5 there is no Dark mode

i

Bump:

In 8.5: System preferences ---> Appearance (hit edit) ----> change from there. 

Thanks a lot!

Thank you for saving my retenas. Ty sm lol

glad to hear it, don't need anyone going blind whilst playing Raid :)