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 and said to them: When it is evening, you say, Fair weather; for the sky is red.
And he commanded them to make all recline in table parties upon the green grass.
and his raiment became shining, exceeding white like snow, as no fuller on earth could whiten them.
And they clothed him in purple; and having plaited a crown of thorn branches, they put it on him,
And the soldiers plaited a crown of thorn-branches, and put it upon his head; and they put on him a purple robe,
you are well known to be a letter of Christ, written by us as his ministers, not with ink, but with the Spirit of the living God, not in tables of stone, but in fleshy tables of the heart.
His head and his hair were white as white wool, as white as snow; and his eyes were as a flame of fire;
And when he had opened the third seal, I heard the third living creature say, Come and see. And I saw, and behold, a black horse; and he that sat on him had a pair of scales in his hand.