In v19.2.2, we refactored the Office2019White theme to make it consistent with the Microsoft Outlook appearance.
We modified the following palette colors:
- Border: #FFE1DFDD -> #FFC8C6C4
- Delimiter: #FFC8C6C4 -> #FFE1DFDD
The image below shows the Outlook Inspired App demo before and after these changes.
If you have a custom theme based on Office2019White, make sure that these colors look consistent with your customizations after upgrading your theme to v19.2.2 and change these colors if necessary - see Edit Palette Colors.