Blue
A variant of Ameraucana (Gallus gallus domesticus)

Representative Ameraucanaphoto — a dedicated image of this exact morph isn't available yet.
Slate-blue plumage produced by the heterozygous blue gene; breeding blue x blue yields blue, black, and splash offspring in roughly 2:1:1.
Keeper tips for this variant
Don't expect 100% blue chicks — the blue gene doesn't breed true, so cull to type and pair with black or splash to manage the ratio.