Note 9 — Introduction.
Reading edition
I believe these coloured glories to be symbolical, but am not sure of the application of the colours. Among the miniatures of the Hortus Deliciarum, painted in 1180, is a representation of the celestial paradise, in which the virgins, the apostles, the martyrs, and confessors wear the golden nimbus; the prophets and the patriarchs, the white or silver nimbus; the saints who strove with temptation, the red nimbus; those who were married have the nimbus green, while the beatified penitents have theirs of a yellowish white, somewhat shaded. (Didron, Iconographie Chrétienne, p. 168.)