In the first and second editions, the colors of the children of Carcassonne are yellow, green, red and blue.
In the third edition, new edition, they replaced green with purple.

I asked this on the facebook page.
This was adjusted because green was already very dominant as the color of the landscape tiles and for some the green meeple was always difficult to recognize. Therefore, it was decided to replace the green to purple. (HiG team 5/25/2020)
A fact for the wikicarpedia
