'Blue' in the Bible

who were clothed with blue, governors and rulers, all of them desirable young men, horsemen riding on horses.

Of fine linen with embroidered work from Egypt was your sail, that it might be to you for a banner; blue and purple from the islands of Elishah was your awning.

These were your traffickers in choice wares, in wrappings of blue and embroidered work, and in chests of rich clothing, bound with cords and made of cedar, among your merchandise.