'Blue' in the Bible

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

Of fine linen with broidered work from Egypt was thy sail, that it might be to thee for an ensign; blue and purple from the isles of Elishah was thine awning.

These were thy traffickers in choice wares, in wrappings of blue and broidered work, and in chests of rich apparel, bound with cords and made of cedar, among thy merchandise.