The reddish purple robe and the crown of thorns mocked Jesus" claim to be the Jews" king. The Greek word porphyran elsewhere describes colors from bright red to deep blue. [1] The crown of thorns was probably not a torture device but part of Jesus" mock royal attire. [source][source][source]
"It may well have been an improvised caricature of the radiate crown signifying divine kingship and frequently depicted on coins then in circulation." [2][source]
"With this "crown" the soldiers unwittingly pictured God"s curse on sinful humanity being thrust on Jesus (cf. Genesis 3:17-18)." [3][source]
Mark did not mention the staff that they placed in Jesus" hand as a mock scepter ( Matthew 27:29). "Hail, King of the Jews" is a parody of "Hail, Caesar." Their repeated beatings, spitting, kneeling as if in worship, and bowing as before a great person, intensified Jesus" sufferings. [source][source][source]
"Irony is a dominant feature of Mark"s story. Verbal irony occurs when a speaker self-consciously says one thing but means the opposite." [4][source]