Electrostrymon joya, the muted hairstreak, is a butterfly of the family Lycaenidae.

It is found from southern Texas and Mexico to Ecuador, Peru and Tobago,[1] as well as on the Netherlands Antilles.

The habitat consists of openings and edges in tropical semideciduous river forests and second growth.

Adults are on wing from April to January in the tropics.

The larvae feed on the flowers of Mangifera indica and Psiguria racemosa.