Exodus 28:15

28:15 “You are to make a breastpiece for use in making decisions, the work of an artistic designer; you are to make it in the same fashion as the ephod; you are to make it of gold, blue, purple, scarlet, and fine twisted linen.

Exodus 39:5

39:5 The artistically woven waistband of the ephod that was on it was like it, of one piece with it, of gold, blue, purple, and scarlet yarn and fine twisted linen, just as the Lord had commanded Moses.