The online version of is an email client that can be accessed using any browser provided that they‌ ‌have‌ ‌an‌ ‌active‌ ‌internet‌ ‌connection. Outlook also allows you to switch the background color from light to dark when you compose an email by clicking the “moon” or the “sun” icon from the top menu bar. Moreover, you can switch the background color of your email from light to dark by‌ ‌clicking‌ ‌the‌ ‌”moon”‌ ‌or‌ ‌the‌ ‌”sun”‌ ‌icon‌ ‌from‌ ‌the‌ ‌top‌ ‌menu‌ ‌bar. If you do not like the new theme, you can return to the same location and select any other theme of your choice. Your Outlook theme will now turn dark across the app.

Now open the drop-down menu below Office theme and select Black. To open Outlook in dark mode, click File in the top-left corner of the app and then click Office account. Enable dark mode in Microsoft Outlook app # Note that the Outlook standalone version that comes with Office 365 supports the dark theme, whereas Outlook 20 currently do not support this feature. Let us show you how you can enable the dark theme on your Outlook, both on the web as well as within the standalone app.

Outlook 2016 dark theme