Exodus 39:22

Christian Standard Bible Anglicised

They  made the woven robe of the ephod entirely of blue yarn.

Cross References

Exodus 39:21

Then they tied the breastpiece from its rings to the rings of the ephod with a cord of blue yarn, so that the breastpiece was above the ephod’s waistband and did not come loose from the ephod. They did just as the Lord had commanded Moses.