linguistic:paraphrasing
Piety, faith, penitence, and theology

In the West, purple or violet is a color often associated with piety and religious faith. In AD 1464, shortly after the Muslim conquest of Constantinople, which terminated the supply of Tyrian purple to Roman Catholic Europe, Pope Paul II decreed that cardinals should henceforth wear scarlet instead of purple, the scarlet being dyed with expensive cochineal. Bishops were assigned the color amaranth, being a pale and pinkish purple made then from a less-expensive mixture of indigo and cochineal.

In the Latin liturgical rites of the Catholic liturgy, purple represents penitence; Anglican and Catholic priests wear a purple stole when they hear confession and a purple stole and chasuble during Advent and Lent. Since the Second Vatican Council of 1962–5, priests may wear purple vestments, but may still wear black ones, when officiating at funerals. The Roman Missal permits black, purple (violet), or white vestments for the funeral Mass. White is worn when a child dies before the age of reason. Students and faculty of theology also wear purple academic dress for graduations and other university ceremonies.

Purple is also often worn by senior pastors of Protestant churches and bishops of the Anglican Communion.

The color purple is also associated with royalty in Christianity, being one of the three traditional offices of Jesus Christ, i. e. king, although such a symbolism was assumed from the earlier Roman association or at least also employed by the ancient Romans.