Microsoft Office for Mac allows you to personalize the Office Theme between two different options. Unlike its Windows counterpart, the options are somewhat limited. Keep in mind, changes to the Theme will apply to all Office 2016 and higher for Mac apps including Word, Excel, Powerpoint, and Outlook.
Customize Microsoft Office Color Theme on Mac
Step 1. Open an Office 2016 for Mac app. In my example, I’ll use Word. Click Word > Preferences
Step 2. Click General
Step 3. Under Personalize, click the Office theme drop down. Choose between Colorful or Classic.
As I mentioned earlier, the options at this point are very minimal when it comes to changing the Color Theme. It’s basically White or Blue. Being that the new Mac Office Suite was just released. Hopefully, Microsoft will add a few more themes in the near future.