Why was our Lord wearing white?
It is significant that Jesus is clothed in a white garment by Herod. It denotes His sinless passion; because the Lamb of God without stain and with glory accepted the sins of the world. (John 1:29) Herod and Pilate, who became friends instead of enemies through Jesus Christ, symbolize the peoples of Israel and the Gentiles, since the future harmony of both follows from the Lord's passion (Eph 2:13) First, the people of the nations capture the Word of God and bring it to the people of the Jew, through the devotion of their faith. They clothe with glory the body of Christ, who they had previously despised.
Note: Now our Lord is wearing the white garments, but in the next hour, they shall be crimson, reddened by our sins and stained by our iniquities.