Dark mode changes the default bright background color in Outlook.com and Outlook on the web to a darker color, which is easier on the eyes in low-light environments or if you prefer less bright interfaces.
Note: Dark mode is only available in the new Outlook.com and Outlook on the web experience.
How do I turn on dark mode?
At the top of the page, select Settings .
Select the toggle next to Dark mode.
Does dark mode support themes?
Currently, dark mode only supports the default blue theme.
Why does my reading pane have a dark background?
When dark mode is turned on, the reading pane has a dark background to reduce eye strain. You can make the reading pane brighter by selecting at the top of the reading pane. If you don't see the button, select .
How do I see the original message formatting?
To see the original message formatting, select at the top of the reading pane.