Is it possible to get the nc24 theme back?

Hi guys!

Is it possible to get the old theme back?

Only as possible within the theme settings afaik. Try changing them

At least for embedded pages (like a public calendar), the sharee should be able to explicitly set the colors and there should be no border around the calendar.

There already is an issue for these kind of ā€œimprove to get back some NC24 featuresā€ theming requests.