Euphonias are among the most difficult species to identify, particularly the females since most of them are equally alike with olive coloration and not a single field mark. When they travel in pairs it is easier, since once the male is identified, one can assume the species of the female relatively safely. In this species, the male is identified by having a yellow forehead that extends back to the nape, and showing a blue/black mask and throat. The upperparts are also blue-black depending on the light, while the chest and belly are bright yellow.