I think the only way to get a robin blue egg color from a chicken would be to gene edit. 

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Start with good blue egg gene stock and keep crossing and culling.I wonder how a person could breed to get a better shade of blue egg color?
I recently bought 10 blue americanas from Paul Smith in Texas. I hope to get some pretty blue eggs from those chicks.
I recently bought 10 blue americanas from Paul Smith in Texas. I hope to get some pretty blue eggs from those chicks.
Mine are from Paul Smith in Texas. I've had extraordinarily bad luck this spring with predators or dogs and had to start all over. They are 3 weeks old so it will be awhile.The best blues I've had was from hatchery EE's.
Where are your Ameraucanas from...and how long do we have to wait to see what they lay?
Gorgeous! My baby Americauna is only 8 weeks, gotta wait a little longer!This is from my Bantam EE Tabitha. View attachment 1813656