Chaucer's color vision

Chaucer didn't have words for the colors like orange, but he could see them.

Canterbury Tales

Knight's Tale, 1273-4

The cercles of his eyen in his heed,
They glowéden bitwyxen yelow and reed

Nun's Priest's Tale, 136-7

His colour was bitwixe yelow and reed,
And tipped was his tayl and bothe hise eeris;