Keluaran 28:6

28:6 “They are to make the ephod of gold, blue, purple, scarlet, and fine twisted linen, the work of an artistic designer.

Keluaran 39:3

39:3 They hammered the gold into thin sheets and cut it into narrow strips to weave ¹  them into the blue, purple, and scarlet yarn, and into the fine linen, the work of an artistic designer.

[39:3]  ¹ tn The verb is the infinitive that means “to do, to work.” It could be given a literal rendering: “to work [them into] the blue….” Weaving or embroidering is probably what is intended.