Change the look and feel of Microsoft 365 - Microsoft Support
https://support.microsoft.com/en-us/office/change-the-look-and-feel-of-microsoft-365-63e65e1c-08d4-4dea-820e-335f54672310
WEBHow to change your theme. To change the color of your Microsoft 365 apps: Open a Microsoft 365 application, like Word, Excel, or PowerPoint. In the top left, select File > Options > General > Office Theme. Choose your favorite option. The default theme setting for Microsoft 365 is Use system setting, which matches your selected look in Windows.
DA: 37 PA: 54 MOZ Rank: 64