This article explains how to enable dark mode on devices running Android 9 and later. The feature is not available in older versions of the operating system.

By default, the theme tint is set to the same wallpaper-detection-based automatic mode as older versions of Android, but there are now dedicated options for a permanent color theme. To enable the dark theme on Android 10 devices:

Open the Settings app.

Tap the switch next to Dark theme to enable it.