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How to turn Dark Mode On/Off on Outlook

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Dark Mode In Outlook



The black color theme in Outlook for Microsoft 365 includes dark mode, which provides a black color scheme for your email interface. You can switch to a white color scheme for your email interface if you would like.




Switch to the Black Theme in Microsoft 365 Outlook



Dark mode is enabled by default when you select the black theme. To switch the current theme on Outlook to the black theme follow these steps.



Go to toolbar and select “File“, then select “Office Account“.



Under the “Office Theme” section, select “Black“.



You have successfully changed your theme to Dark Mode.





How to change your Dark Mode theme on or off



You can turn dark mode on and off when reading a message in Outlook by clicking the icon of a the top of your message in the shape of either a sun or moon.

Outlook Sun Icon



  • The sun icon will change the message background to white

Outlook Moon Icon



  • Meanwhile the moon icon will change the message background to black.




Disable Dark Mode



If you would like you can disable dark mode so the window will always be white when using dark mode. The icons will be disabled to turn dark mode on and off.



In Outlook, go to “File” and then “Options“.



On the “General” page, look for “Personalize your copy of Microsoft Office“.

Set the “Office Theme” to “Black” and select the check box next to “Never change the message background color” and click “OK”.


How to Change the theme of Microsoft Office

You can change the way your Microsoft office theme looks by changing the Office Theme or background.

Go to “File“, “Options“, “General“, and “Office Theme” to change the background color and design of all your Microsoft Office programs. 

Colorful Theme

This theme aligns with the visuals of our modern Office apps by bringing their primary accent color.

Dark Grey theme

The dark grey theme is perfect for those we who prefer a softer take on high-contrast visuals. 

Black Theme

This feature is only available for Microsoft 365 subscription holders. If you are a Microsoft 365 subscriber, make sure you are using the latest version of office.

The black theme provides the highest-contrast visual for your office theme. 


White Theme

The white theme displays the classic look of office. 



How to Change the background of Microsoft Office

Go to “File“, “Account” (“Office Account” in Outlook), and pick an Office Background from the list.   Every computer connected to your Office Account will use the same background.

Only change the background on this computer 

Go to “File“, “Options“, and under “Personalize your copy of Microsoft Office” pick an “Office Background” from the list.



How to change a theme and make it the default in Microsoft Outlook

It may be confusing to change the theme or color scheme of your Microsoft Office programs. To change your current theme, switch to a different one, or create a new theme, you use slightly different commands, depending on which app you are using:

  • Options tab in an Outlook message
  • Design tab in an Access form 

Change Theme Colors


Outlook Background Themes

Open a new message and on the “Options” tab, click “Colors“, and pick the set color set you want.

Outlook Select Background Color

To create your own set of colors, click “Customize Colors” and click the button next to the theme color you would like to change (ie. Accent 1 or Hyperlink) and then pick a color under “Theme Colors“. 


To create your own color click “More Colors” and then select a color on the “Standard” tab or enter number on the “Custom” tab. 

Repeat this for all the colors you want to change.

In the “Name” box, type a name for the new theme colors, and then click “Save“.



More About Themes 

Outlook More About Themes

A document theme is a unique set of colors, fonts, and effects. Themes are shared across Office programs so that all of your documents can have the same, uniform look.
You can also change the Office theme. The Office theme is the color scheme for your entire Office program, while document themes are more specific.  

What is an Office Theme?

A theme is a quick and easy way to give a professional and modern look to a Microsoft Office document. A document theme is a set of formatting choices that include a set of theme colors, a set of theme fonts (including heading and body text fonts), and a set of theme effects (including lines and fill effects).

The way in which document themes are used has evolved since their introduction and use Microsoft Office 2010, which are described in detail below.