Blue
A variant of Fischer's Lovebird (Agapornis fischeri)

Representative Fischer's Lovebirdphoto — a dedicated image of this exact morph isn't available yet.
A recessive mutation removing yellow pigment, turning the body powder-blue with a white-and-grey face. One of the oldest and most established Fischer's mutations.
Keeper tips for this variant
Blue is recessive, so pair a blue to a blue or split bird to get visual blues; the white face shows dirt readily, so offer frequent bathing opportunities.