'Blue' in the Bible

Who were clothed in blue, captains and rulers, all of them young men to be desired, horsemen seated on horses.

She was full of desire for the Assyrians, captains and rulers, her neighbours, clothed in blue, horsemen going on horses, all of them young men to be desired.

The best linen with needlework from Egypt was your sail, stretched out to be a flag for you; blue and purple from the sea-lands of Elishah gave you shade.

These were your traders in beautiful robes, in rolls of blue and needlework, and in chests of coloured cloth, corded with cords and made of cedar-wood, in them they did trade with you.