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
And he answering, said unto them, When evening comes, ye say, Fair weather, for the sky is red.
And he commanded them to seat them all by companies on the green grass:
His garments became glistering, exceeding white, like snow; such as no fuller upon earth can whiten.
And they invested him with a robe of purple, and platting a crown of thorns, put it about his head,
And the soldiers having platted a crown of thorns, put it on his head, and they clothed him in a purple robe,
because ye are manifestly seen to be the letter of Christ, of which we have been the secretaries, written not with ink, but by the Spirit of the living God, not on tables of stone, but on the fleshly tables of the heart.
his head and flowing locks white as a white fleece of wool, even as the snow; and his eyes as a flame of fire;
And when he opened the third seal, I heard the third living being say, Come and see. And I saw, and lo! a black horse; and he that sat upon it had a pair of scales in his hand.