Microsoft has been bringing a dark mode to more and more of its products over time, and OneNote on Android seems to be next in line. As first reported by Windows Latest, users that have enrolled in the beta program for OneNote on Google's operating system are now getting a dark mode through a server-side update to the app.
According to the report, only a select number of beta testers are seeing the new mode, and the app will follow your system settings; unfortunately, there's no toggle to turn it on and off in the app. Based on our testing, the app doesn't actually follow the system setting for the dark theme, but it does activate when Battery Saver is turned on. It could be that different implementations of Android handle it differently.
It's also worth noting that while dark theme will change many aspects of the UI, it won't affect the color of notebook pages. Likewise, the Sticky Notes list only seems to adopt dark mode when there are no notes on it, and the Search page also shifts to a white background when it starts displaying search results.
OneNote is one of the products that's taken the longest for Microsoft to bring a dark mode to. The Windows 10 app started seeing it in May. On Android, many Microsoft apps still don't support it, but Outlook is another one that's apparently set to receive it soon, as the new look was revealed in leaked renders earlier this week.