However, they’ll just use your system theme setting by default. You can also choose to set your theme separately in the Groove music player and Movies & TV video player apps. To activate a dark theme in Edge, open the Microsoft Edge web browser, open the menu, and select “Settings”.
However, its dark theme option is entirely separate from the main option in Settings…for some reason. The MIcrosoft Edge web browser included with Windows 10 also has a dark theme. This option also doesn’t affect desktop applications, including Windows 10’s File Explorer, which will remain white. However, it’s up to each developer to support the dark theme, and some applications will continue using their normal colors. The Settings application itself will immediately turn dark, as will many other “Universal Windows Platform” applications. Scroll down and select “Dark” under “Choose your app mode”. To enable the new dark theme, head to Settings > Personalization > Colors. Enable Dark Mode for Windows 10 Settings and Apps
