These directions apply to Windows, Mac, Android, iOS, and web users.

Here’s how to get there:

SelectFilefrom the top corner.

snag the drop-down menu belowOffice Theme, then selectBlack.

File highlighted in Outlook 365

It’s easy to get there:

These steps also work if you’re using thenew Outlook for Windows.

SelectDarkto instantly turn on dark mode.

Tap thegearicon at the bottom.

Office Account highlighted in Outlook 365

Choose theDarktheme to immediately switch the Outlook app to dark mode.

If you chooseSysteminstead, Outlook will use whatever theme your phone is set up to use.

Here’s how:

From the menu, chooseOutlook>Preferences.

The black office theme chosen in Outlook for Windows

Ifdark mode is turned on for your Mac, selectingSystemwill make Outlook use the dark theme automatically.

FAQ

Toturn on dark mode in Windows 11, go toSettings>Personalization>Colorsand chooseDark.

To make a custom dark theme, go toSettings>Personalization>Themes>Custom.

Settings gear in Outlook.com

General in Outlook.com Settings

Appearance highlighted in Outlook.com settings

Dark mode enabled in Outlook on the Web

The Dark theme selected in the Android Outlook app

Preferences in Outlook menu in Outlook 365

General highlighted in the Outlook 365 Preferences window