To enable dark mode on Chrome for Android, open the settings menu and select Themes. You will be able to choose from the Light, Dark, or System Default theme. If you select Dark, your Chrome browser will automatically use a dark theme when possible. You can also enable dark mode in Chrome for Android by long-pressing on the address bar and selecting Themes. Dark Mode on Chrome for iOS To enable dark mode on Chrome for iOS, open the settings menu and select Dark Mode. You will be able to choose from the Light, Dark, or System Default theme. If you select Dark, your Chrome browser will automatically use a dark theme when possible. You can also enable dark mode in Chrome for iOS by long-pressing on the address bar and selecting Themes.