Dark Theme has been a consistent top feedback point for the MSN News app. Back in January we released dark theme for articles to help with nighttime reading, but this did not extend to the full MSN News experience. Now, we are very happy to respond to your feedback, and showcase a new and improved dark theme experience across MSN News.
The new experience is available on version 4.12.184 and higher. To double-check your app version, you can always go to Settings, About.
If your operating system theme is already set to dark, the app will automatically switch to the dark theme. Otherwise you can always switch to the dark theme via "Turn on dark theme" menu item in the Command Bar or via the app settings page. Note that certain pages which are served via external web pages may not support the dark theme.
We would like to hear from you on your experience with the dark theme. Let us know! Please use the in-app Feedback feature, or ping me via @xnt.