As no-one else has responded to this thread (so far) I have done some research myself and found that the Atari-version seems to use red instead of orange, while the IBM PC jr.-version seems to include both red and orange, but misses purple:
https://www.youtube.com/watch?v=mrvwjOj09b0So the list look like this:
C64 : purple, blue, green and orange.
Atari : purple, blue, green and red.
IBMPCjr. : orange, red, blue, green.
But what about other versions? Are there other colors in use, and if so, what other colors?