Microsoft announced this week that it will bring a "dark mode" to Outlook mobile applications for both iOS and Android. Productivity apps hosted on Office.com will also get the update, meaning you can work with Word, Excel, PowerPoint, Teams in a darker, more sustainable and less eye-harsh design.
This dark mode will work just like the others, making apps darker. The functionality is ideal for when working in dimly lit places, at night or in public.
There is a working argument in this update, which is the battery optimization allowed on devices with OLED displays. In these cases, the pixels of the dark part images can be erased to save energy.
By September, Excel, PowerPoint, and Word apps are set to go dark, like OneDrive and Planner on the web.