Small, handsome tanager with piercing yellow eyes. Males are mostly cobalt-blue with a white belly and a black mask. Note the black feathers on the back and the blue-edged wings. Females are greenish-olive. Rare; found in the canopy and edges of humid forest on poor-quality soils, where it forages acrobatically and sometimes accompanies mixed-species tanager flocks. The similar male of the more common Black-faced Dacnis has darker blue plumage and a black mask that extends to the nape, while females are browner above and paler below.