As of today, a new theme is available for Tech Community that features a more modern look and additional functionality.
New Welcome Bar
We have introduced an updated, cleaner welcome bar where you can still search for existing topics.
Additionally, references to the Cumulocity webpage and trial form have been added at the top.
Creating a new topic has moved from the far right to the left-hand side, positioned above the navigation. Remember: Search before you post 
More Color!
Categories and sub-categories are now automatically color-coded, making it much easier to recognize the content you are viewing.
Additional Category Description
Each category now features a new header that is displayed on the respective category page when you navigate to it.
It’s Getting Dark…
The new theme also supports dark mode when your browser is set to the dark mode preference.
Reverting to the Previous Theme
If you are not comfortable with the new theme, you can switch back to the previous one.
In your user profile, navigate to Interface and switch back to the “Default” theme.
https://community.cumulocity.com/my/preferences/interface
There’s More…
We hope you enjoy the new theme as much as we do! Happy exploring! 
What do you think? I would be happy to read & discuss your feedback in the comments!