"The overall execution of dark theme across Windows is poor; an opinion re-enforced by the recent introduction of a dark theme in MacOS Mojave. On its first move, Mojave appears to have magically gotten the concept pristinely materialized systemwide. Windows 10, on the other hand, has had a dark theme for 3 years and exceptions are still the norm. This seems to be the case with just about every aspect of Windows 10’s design."
https://www.onmsft.com/news/its-here-our-hands-on-review-of-the-windows-10-october-2018-update-video