Caloptilia violacella is a moth of the Gracillariidae family. It is known from Illinois, Missouri, Florida, Georgia, Kentucky, Maine, Maryland, New York and Texas in the United States. The wingspan is about 10 mm. The larvae feed on Cajanus cajan, Desmodium species (including Desmodium rotundifolium) and Meibomia dillenii. They mine the leaves of their host plant.