Augustine of Hippo

Hence we understand what Mark means by clothed him with purple; (Mark 15:17.) instead of the royal purple, this scarlet cloak was used in mockery; and there is a shade of purple which is very like scarlet. Or it may be, that Mark spoke of the purple which the cloak contained, though its colour was scarlet. (ubi sup.) But Matthew seems to introduce this here as recollected from above, not that it was done at the time Pilate gave Him up for crucifixion. For John puts it before. He is given up by Pilate. (Quaest. Ev. ii. …

Catena Aurea by Aquinas ↗

Hilary of Poitiers

Or otherwise; The Lord having taken upon Him all the infirmities of our body, is then covered with the scarlet coloured blood of all the martyrs, to whom is due the kingdom with Him; He is crowned with thorns, that is, with the sins of the Gentiles who once pierced Him, for there is a prick in thorns of which is woven the crown of victory for Christ. …

Catena Aurea by Aquinas ↗

Thomas Aquinas

"And stripping him, they put a scarlet cloak about him." Here the mockery is described. And first, as to the garment; second, as to the honor; third, as to the reproach. The second is at "and bowing the knee before him, they mocked him"; the third is at "and going out, they found a man of Cyrene, named Simon etc." It should be noted that although they had accused him of many things, yet he was not suffering for any other reason than because he called himself king, as is found in John 19:12: "if thou release this man, thou art not …

Commentary on Matthew ↗