"Dark Mode for the Web" New Feature?

[C.clavin]

I noticed in the new Safari stable release there's a dark mode option enabled now. Has anyone noticed any sites that work with it? Guessing its enabled when the site injects some CSS? I know there are 3rd party solutions, but nobody's talking about this new feature in Safari 12.1

 

[TETENAL]

https://webkit.org
http://atp.fm
https://kevinchen.co/blog/support-macos-mojave-dark-mode-on-websites/

 

[Polaroid]

started to notice more websites are enabling a dark theme over the last couple days looking good!