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Office Settings & Configuration

How to Create Custom Color Themes in Excel and Word on Mac

Maira MehtabMaira Mehtab Sep 21, 2026 868 views

Question details

The user wants to create custom color themes in Microsoft Excel and Word on a newer iMac running Microsoft 365, but the option previously available in the Design tab is missing.

Product
Microsoft Excel, Word, and PowerPoint
Device & OS
Mac
Scenario
Setting up brand colors or custom color palettes for documents and spreadsheets in Microsoft 365 on macOS.
Observed behavior
The interface to create custom color schemes is absent from the Design tab in Excel and Word on Mac.
Before you start

Ensure you have Microsoft PowerPoint installed on your Mac, as Microsoft 365 requires you to use PowerPoint's interface to build custom themes that can then be applied to Word and Excel.

Solution 1Recommended

Use PowerPoint to Create and Save Custom Themes

Since Excel and Word for Mac lack the direct interface to create custom color themes, you must use PowerPoint to build and save them for use across all Office apps.

Microsoft 365 for Mac consolidates theme creation into PowerPoint. Once you create and save a theme in PowerPoint, it becomes available in the Themes gallery for both Word and Excel on the same device.

1
Open PowerPoint on Mac

Launch Microsoft PowerPoint and open a new blank presentation.

2
Access Theme Colors

Navigate to the 'Design' tab on the ribbon. Click the arrow next to the 'Variants' group, then select 'Colors' and click 'Customize Colors'.

3
Define Your Custom Palette

In the dialog box, choose your desired colors for text, backgrounds, and accents. Enter a memorable name for your custom theme and click 'Save'.

4
Apply in Word or Excel

Open Word or Excel. Go to the 'Design' tab (in Word) or 'Page Layout' tab (in Excel), click the 'Themes' dropdown, and select your newly saved theme under the Custom section.

Theme Synchronization: Once saved, the custom color theme is stored in your Mac's User Templates and will automatically populate in all Microsoft 365 apps.
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Frequently Asked Questions

Why can't I find the custom color option in Word or Excel for Mac?

Microsoft 365 for Mac restricts the creation of custom color themes to PowerPoint. While Word and Excel can apply existing themes, they lack the interface to create new custom color palettes from scratch.

Where are custom Office themes saved on a Mac?

Custom themes are typically saved in the local user's hidden Library folder, navigating to ~/Library/Group Containers/UBF8T346G9.Office/User Content/Themes/.

Can I share my custom color theme with other Mac users?

Yes, you can share a custom theme by exporting it as a .thmx file from PowerPoint. Other users can open this file or place it in their local Office Themes folder to use the same colors.