Reference: Colours
Hastings
The colours named in OT and NT, as in other ancient literatures, are few in number, and of these several are used with considerable latitude.
1. White as the colour of snow in Isa 1:18, of the teeth described as milk-white (Ge 49:12), and of horses (Zec 1:8; 6:3,6); also of wool (Re 1:14)
See Verses Found in Dictionary
but he answered them, in the evening you foretel fair weather: when the sky is of a bright red.
then he order'd the people to sit down in distinct companies upon the green grass.
his raiment was of an exceeding bright whiteness, like that of snow, and such as no fuller upon earth could imitate.
and they put on him a purple cloth, and set a wreath of thorns upon his head for a crown;
and the soldiers having made a crown of thorns, they put it on his head, and threw a purple robe about him.
which shows you to be the epistle of Christ, written by my ministration, not with ink, but with the spirit of the living God; not on tables of stone, but on living tables of the heart.
his head and his hairs were white like wool, as white as snow; and his eyes were as a flame of fire; his feet were like fine brass,
When he had opened the third seal, I heard the third animal say, "come and see." and I beheld, and saw a black horse; and he that sat on him had a balance in his hand.