Blue or green eggs can be introduced to any kind of chicken since O, the dominant gene responsible for blue pigment in the eggshell, is dominant. A simple cross and backcross followed by selection for shell coloration and whatever other characteristics are desired should do the trick.
This is why I believe talk about an "original" araucana is nonsense.
Pilgrim in a foreign land and true believer.
1st John 5:11-12