Please follow the below steps to change the default mail reader on your Mac. Click Microsoft Outlook and set it as the default. Change the Microsoft Office Color Theme. Launch any Office program and click the File tab and then Account.There under Office Theme, select the color you want from the drop-down menu.

Are you one of the persons that enjoy some changes occasionally in the environment that you work in? Are you one of the persons that need to concentrate and stay more focus on your computer screen? This is where DarkMode appears in MicrosoftOutlook. DarkMode makes it easier for our eyes in an environment with low light. To find out how to set Outlook into DarkMode, just keep on reading the post below.

We must select the File tab to move into BackstageView and once there, from the left of the drop-down menu that appears we select the OfficeAccountcategory as shown in the image below.

Once the OfficeAccount category is selected, we notice in the middle of the task pane and under the Account area among the other commands available, we have the OfficeTheme area located there. If we select the drop-down menu under the OfficeTheme area, there are located the following Modes available: Colorful, DarkGray, Black and White. For this post I will select the command DarkMode.

Once DarkMode is selected, Outlook has changed into a Black Color Theme which includes DarkMode. DarkMode provides a BlackBackground instead of white for the MessageWindow. Once we apply DarkMode in MicrosoftOutlook, the same applies to all the other Microsoft Office Programs such as Word, Excel, PowerPoint and etc.

In BlackTheme we can read our Messages with a DarkBackground as shown in the image below. In the following image, we can see how cool DarkMode looks like.

In the next image I have opened an E-Mail Message. If the DarkBackground is confusing for us to read the Message, we always have the option to turn the Body of the Message into a WhiteBackground. All we need to do, is to locate at the top right corner of the Message the SwitchBackground command as shown below and activate it. Immediately, the Body of the Message turns into white, while all the rest remain Black.

Once we select the SwitchBackground command, the icon changes into a Moon. If we select it again it will change into a Sun icon.

In the next image, we can see how DarkMode looks like in MicrosoftWord.

In the next image, we can see how DarkMode looks like in MicrosoftExcel.

In the next image, we can see how DarkMode looks like in MicrosoftPowerPoint.

As mentioned in the beginning, no matter which application we are working with, once we select Dark ModeTheme or any other Theme it will be applied in all MicrosoftApplications.

Below you can check out the video describing How To Set Microsoft Outlook into DarkMode?

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Original KB number: 3009176

Symptoms

After you migrate to Microsoft Outlook 2016 for Mac from Outlook for Mac 2011, you notice that the category colors that are assigned to your categories are changed.

Cause

Outlook for Mac 2011 uses a local list of categories. The names of these categories are synchronized to the server that's running Microsoft Exchange Server when they're assigned to items. This makes the names visible on different clients and devices. However, the colors for these categories aren't synchronized to Exchange.

Outlook 2016 for Mac uses the Master Category List (MCL) that's stored on the Exchange server to synchronize the category names and colors.

So when you migrate from Outlook for Mac 2011 to Outlook 2016 for Mac, any local category names that are assigned to items are merged with the MCL. Random colors are assigned to these categories because the colors from Outlook for Mac 2011 aren't synchronized.

Resolution

Update the colors that are assigned to categories in the MCL in Outlook 2016 for Mac. To do this, follow these steps:

On the Home ribbon, click Categorize > Edit Categories.
If you have more than one account that's added to Outlook 2016 for Mac, make sure that the correct Exchange account is selected.
For each category for which you want to change the color, click the color block, and then select the color that you want.
Make any additional changes that you want by changing the names of categories and by adding or removing categories, as appropriate.
Close the Categories window.

Change Microsoft Outlook Theme Mac

The changes that you make should be saved in the MCL and should be viewable from other clients and devices. Scarface the world is yours mac.

More information

In Outlook for Mac 2011, thousands of colors can be assigned to local categories. In Outlook 2016 for Mac, 25 predefined colors can be assigned to MCL categories. These colors are predefined by the Exchange server MCL.

Microsoft Outlook For Mac Change Theme

If you have an IMAP or POP account that's set up in Outlook 2016 for Mac, local categories are used. So you can select from thousands of colors for these categories.