Amakrits is a striking FMX style that looks great in Deplhi 10.3 Rio's new FMXLinux. Its bold teal accents will make any project stand out, and it comes included in Delphi 10.3 Rio.
All you have to do is use a TStyleBook to include the Linux version of the Amakrits style, which can be found in the Styles folder.
Here is a sample of the Amakrits FMX style in action on Linux:
The Amakrits style is not just for Linux, either. It looks great on Windows, iOS, Android, and macOS as well.