Very good article about the indigo bunting
He is the indigo bunting. Silhouetted against the sky, he looks black. But when he comes to the ground to feed, forage, court, or chase a rival, he is blue. No -- to call the indigo bunting blue is to do him a disservice. He is "indigo blue" -- rich and sparkling blue, like the treasured blue dye of the plant genus Indigofera which the classical Greeks and Romans imported from far distant India (hence the "indigo.")
