27 Again, when He had been judged before Pilate, He was clothed in red; for there they put on Him a purple robe. Is this also written? Esaias says, Who is this that comes from Edom? The redness of His garments is from Bosor; (who is this who in dishonor wears purple? For Bosor has some such meaning in Hebrew.) Why are Your garments red, and Your raiment as from a trodden wine-press? But He answers and says, All day long have I stretched forth Mine hands unto a disobedient and gainsaying people.
Source: Catechetical Lectures (New Advent)