A new default document theme is coming to Word, Excel, PowerPoint, and Outlook across your endpoints. The new theme will include the new default font, Aptos, a new color palette, and updated default line weights.
This change is associated with Microsoft 365 Roadmap ID: 161740
When this will happen:
Preview: This feature is now available.
Standard Release: We will begin rolling out mid-August and be fully rolled out by mid-November 2023 (previously late September).
How this will affect your organization:
The default Office theme will be changing across Word, Excel, PowerPoint, and Outlook on Windows, Mac, iOS, Android, and Web.
What you need to do to prepare:
There is no action needed to prepare for this change.
More information: https://pre.insider.microsoft365.com/en-us/blog/office-has-a-new-default-theme