Exodus 25:4

“And blue, and purple, and scarlet, etc.] The Jewish doctors are much divided about the sense of the words so rendered by us; some will have one colour, and some another meant; but, according to those learned men, who have taken much pains in searching into the meaning of them, as Bochart and Braunius, it appears that our version of them is most correct: and by these we are not to understand the colours themselves, which could not be brought, nor even the materials for dying them are intended; but wool, or clothes, either silken or linen of those colours: of the former the apostle has taught us to expound them, (<580919>Hebrews 9:19) and so Jarchi interprets them of wool thus died, and…”

“goats' hair--or leather of goats' skin.”

“Yahweh had redeemed the Israelites from bondage. He had made a covenant with them and had given them laws. He had promised, on condition of their obedience, to accept them as His own “peculiar treasure,” as “a kingdom of priests and an holy nation” Exodus 19:5-6. And now He was ready visibly to testify that He made his abode with them. He claimed to have a dwelling for Himself, which was to be in external form a tent of goats’ hair Exodus 19:4, to take its place among their own tents, and formed out of the same material (see Exodus 26:7 note). The special mark of His presence within the tent was to be the ark or chest containing the Ten Commandments on two tables of stone Exodus 31:18,…”

“Blue, and purple, and scarlet - Materials of those colours. Exodus 25:5”

“blue: Techaileth, generally supposed to mean an azure or sky-colour; rendered by the LXX, υακινθον, uakinthon, and Vulgate, hyacinthum. fine linen: or, silk, Gen 41:42; Eze 16:10; Rev 19:8 Exodus 25:5”