structural:expansion, structural:scholar_edition, quality:corruption, stylistic:tone, linguistic:paraphrasing
Religion

In the Christian religion, grey is the color of ashes, and so a biblical symbol of mourning and repentance, described as sackcloth and ashes. It can be used during Lent or on special days of fasting and prayer. As the color of humility and modesty, grey is worn by friars of the Order of Friars Minor Capuchin and Franciscan order as well as monks of the Cistercian order. Grey cassocks are worn by clergy of the Brazilian Catholic Apostolic Church.

Buddhist monks and priests in Japan and Korea will often wear a sleeved grey, brown, or black outer robe.

Taoist priests in China also often wear grey.