Joris-Karl Huysmans,
The Cathedral — Chapter VII
“ On the other hand, consider this blue which Angelico uses so sumptuously in his celestial tones; when he makes it darker it loses its fulness, and looks almost dull; we see this in St. Clara's hood.But what is yet more amazing is that this painter, so eloquent in blue, is but a stammerer when he makes use of the other angelic hue—rose-pink. In his hands it is neither subtle nor ingenuous; it is opaque, of the colour of blood thinned with water, or of pink sticking-plaister, excepting when it trends on the hue of wine-lees, like that of the Saviour's sleeves. ”

