after updating to 2021.9.0
the colors changed to this
this is very hard for me to read 
I changed my Tools/Options/Environment/General/Color Theam to Light
made it legible
Yuck. I’ve opened an issue for this and will get it resolved.
i also keep seeing this not sure if its related.
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\PowerShell Tools for Visual Studio\PowerShellProTools.targets(4,5): error : Could not load file or assembly ‘Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed’ or one of its dependencies. The system cannot find the file specified.
We’re going to release 2021.9.1 to address these issues. I can reproduce them. It should be available tomorrow.
iv installed it, every thing looks to be normal once more!.