Araucana in black and white = blue/turqoise eggs
The American Auracana is a different bird from the British Auracana and I'd assume German as well. The American Auracana has a fatal gene (tuft gene) that when it pairs up the embryo dies before it hatches. I would not want that gene in my flock. I'm not sure if the British or German versions have that lethal tuft gene. Probably not. In the US I'd substitute Ameraucana in your mix.