Electrostrymon joya, the Muted Hairstreak, is a butterfly of the Lycaenidae family. It was described by Dognin in 1895. It is found from southern Texas and Mexico to Ecuador, Peru and Tobago, as well as on the Netherlands Antilles. The habitat consists of openings and edges in tropical semideciduous river forests and second growth. The larvae feed on the flowers of Mangifera indica and Psiguria racemosa.