Exodus 28:31

“You are to make the robe of the ephod entirely of blue yarn.

Exodus 28:4

These are the garments that they must make: a breastpiece, an ephod, a robe, a specially woven tunic, a turban, and a sash. They are to make holy garments for your brother Aaron and his sons so that they may serve Me as priests.

Exodus 28:28

The craftsmen are to tie the breastpiece from its rings to the rings of the ephod with a cord of blue yarn, so that the breastpiece is above the ephod’s waistband and does not come loose from the ephod.

Exodus 39:22-26

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

Leviticus 8:7

He put the tunic on Aaron, wrapped the sash around him, clothed him with the robe, and put the ephod on him. He put the woven band of the ephod around him and fastened it to him.

Treasury of Scripture Knowledge

Summary

And thou shalt make the robe of the ephod all of blue.

Bible References

General references

Exodus 28:4
These are the garments that they must make: a breastpiece, an ephod, a robe, a specially woven tunic, a turban, and a sash. They are to make holy garments for your brother Aaron and his sons so that they may serve Me as priests.
Exodus 39:22
They made the woven robe of the ephod entirely of blue yarn.
Leviticus 8:7
He put the tunic on Aaron, wrapped the sash around him, clothed him with the robe, and put the ephod on him. He put the woven band of the ephod around him and fastened it to him.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.