And they stripped him - That is, they either took off all his upper garments or removed all his clothing, probably the former.
A scarlet robe - Mark says they clothed him in "purple." The "scarlet" color was obtained from a species of fruit; "purple" from shell-fish.
See the notes at Isaiah 1:18. The ancients gave the name "purple" to any color that had a mixture of "red" in it, and consequently these different colors might be sometimes called by the same name. The "robe" used here was the same kind worn by Roman generals and other distinguished officers of the Roman army, and also by the Roman governors. It was made so as to be placed on the shoulders, and was bound around the body so as to leave the right arm at liberty. As we cannot suppose that Pilate would array him in a new and splendid robe, we must suppose that this was one which had been worn and cast off as useless, and was now used to array the Son of God as an object of ridicule and scorn.

Stripped him - Took off his mantle, or upper garment.
A scarlet robe - Or, according to Mark and John, a purple robe, such as emperors and kings wore.

(5) And they stripped him, and (k) put on him a (l) scarlet robe.
(5) Christ endures that reproach which was due to our sins; meanwhile, in spite of this, by the secret providence of God he is entitled king by those who did him that reproach.
(k) They threw a cloak about him and wrapped it around him, for it did not have any sleeves.
(l) John and Mark also mention a purple robe, which is also a very pleasant red. But these profane and impudently disrespectful soldiers clad Jesus in this array to make an additional mockery of him, this one who was indeed a true King.

And they stripped him,.... Of his clothes; at least of his upper garment: for one man to spit upon another, as these soldiers afterwards did on Christ, or to strip him of his garment, according to the Jewish canons, were punishable with a fine of four hundred pence (z), which amounted to twelve pounds and ten shillings of our money; but the soldiers were in no danger of being prosecuted, for stripping Christ. This is one part of the low estate Christ submitted to: his clothes on his back seem to be all he had in this world, and of these he is stripped:
and put on him a scarlet robe, or "a red coat", as the Persic version renders it; very likely an old coat of one of their officers. The Evangelists Mark and John say it was "purple", Mark 15:17, and so the Arabic version renders it here: whether there were two garments put upon him, the one a purple vest, and the other a scarlet robe over it; or whether scarlet was used instead of purple, is not certain; which was a colour wore by kings, and a sign of imperial dignity (a); and therefore put upon Christ by way of mockery, upbraiding him with the character he bore, as king of the Jews. This was an emblem of his being clothed, as it were with our sins, which are as scarlet, and of his bloody sufferings in the human nature.
(z) Misn. Bava Kama, c. 8. sect. 6. (a) Alexander ab Alex. Genial. Dier. l. 1. c. 28.

They stripped him. His clothing, stripped off at the scourging, had been replaced, but was now removed to wrap him in a mock royal mantle. Scarlet or purple were the royal colors.

They put on him a scarlet robe - Such as kings and generals wore; probably an old tattered one.