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
He replied, "In the evening you say, 'It will be fine weather, for the sky is red;'
So He directed them to make all sit down in companies on the green grass.
His garments also became dazzling with brilliant whiteness--such whiteness as no bleaching on earth could give.
they arrayed Him in crimson, placed on His head a wreath of thorny twigs which they had twisted,
And the soldiers, twisting twigs of thorn into a wreath, put it on His head, and threw round Him a crimson cloak.
For all can see that you are a letter of Christ entrusted to our care, and written not with ink, but with the Spirit of the ever-living God--and not on tablets of stone, but on human hearts as tablets.
His head and His hair were white, like white wool--as white as snow; and His eyes resembled a flame of fire.
When the Lamb broke the third seal, I heard the third living creature say, "Come." I looked, and a black horse appeared, its rider carrying a balance in his hand.