Microsoft are updating the default and dark theme colours in Teams on the web and will also update Fluent icons to align other Microsoft 365 applications, from mid-January 2021.
What will these changes look like?
You will see:
- Added drop shadows between panels
- Rounded corners for square graphical elements (like buttons)
- Colour adjustments to the default and dark themes
Current view:

Image is not our own. Image courtesy of Microsoft, taken from Message Center email: Major Change Update Notification.
Updated design:

Image is not our own. Image courtesy of Microsoft, taken from Message Center email: Major Change Update Notification.