Thank youThose whites look so angelic, all soft and almost transculent.
There are only two egg shell colors- white and blue. All the tan/brown colors are pigments produced over the eggshell.
Blue is supposedly only the blue eggshell gene with none of the tan/brown genes.
There are quite a lot of separate genes for tinted, tan and brown colors. This is why tint is so hard to get rid of after a single crossing with a brown egg layer. Also why it can be hard to get back to blue with no green tint after crossing with brown layers.
Shades of green and olive are blue combined with various genes for tint/brown.
AFAIK there is no specific gene for 'pinkish' eggs, it is a variation of the tinted egg color. I have no idea if pinkish plus blue= turquoise. However due to above, would suspect this would produce a lot of greenish layers because blue to pinkish is genetically a cross of blue to tinted.
Back when I had araucanas, they did lay bluish and "turquoise-ish"(blue with slight green tint- is that your definition also?). From what I can remember.. crossing them with tinted(pale tan) layers produced mostly green layers.
The best turquoise-ish eggs were from birds via egg trade.. was supposed to be NN(as in the breed) but chicks came out way obviously all mixed up- crests, leg feathers, all sorts of colors combs etc. I don't know why their eggs were consistently pale blue, blue or turquoise- none laid green... especially the birds are so obviously mixed but whatever the reason their eggs were beautiful.
I didn't think I'd like the white as much as I do. They are very delicate looking, and have leghorn in them (their father) so that should beef up their egg size and quantity. Talking about egg colours... One of my NNs lays a turquoise egg. Not green.. Comparable to my pure Ameraucana, which is confusing to me, as she was fathered by a Barred Plymouth Rock, and came out of a green egg.. How does that work?