The feathers on the head, neck and breast of the Mauritius blue pigeon were silvery white, long, stiffened and pointed, especially around the neck. A patch of bright red, naked skin surrounded the eyes, and extended across the cheeks to the beak, which was greenish with a dark tip. The plumage of the body was indigo, and the back, scapular feathers and wings were metallic blue. The bases of the outer rectrices were partially blackish blue. The tail feathers and tail coverts were maroon. The bill was greenish with a darker tip, and the legs were dark slate-grey. The iris was reddish orange and had an inner yellow ring.