Blue
A variant of Pacific parrotlet (Forpus coelestis)

Representative Pacific parrotletphoto — a dedicated image of this exact morph isn't available yet.
A recessive mutation removing yellow, leaving a soft sky-to-cobalt blue body with deeper blue markings on the cock. The most popular parrotlet color after the normal.
Keeper tips for this variant
Purely cosmetic and as hardy as the wild-type; source from an unrelated line, as blue is so heavily bred that some lines are inbred and small in size.