You can change the look and feel of all your Office programs by changing the Office Theme. In Office 2016 you can choose from Colorful, Black, Dark Gray, and White themes.
The Office theme will be applied to Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, OneNote 2016, Publisher 2016, Visio Professional 2016, Visio Standard 2016, Office 2016 if installed on your PC.
The colorful theme aligns with the visuals of Microsoft’s modern Office apps by bringing their primary accent color to the ribbon.
The dark gray theme is perfect for those who prefer a softer take on high-contrast visuals.
The Black theme provides the highest-contrast visual for your Office theme. This theme will first roll out to Office Insider participants, and later to consumer and commercial Office 365 subscribers.
The white theme displays the classic look of Office.
This tutorial will show you how to change the theme in Office 2016 for your account on Windows PC(s).