The most common color worn by priests is green, which is the color for Ordinary Time. White (or gold) is worn for the Seasons of Christmas and Easter. It is also worn on feasts of Our Blessed Lord (saving His Passion), Feasts of the Blessed Mother, and Feasts of the Saints who were not martyrs. Violet is worn during Advent and Lent, it is also worn when hearing confessions, and sometimes during funerals. Red is worn during Feasts of Martyrs, Feasts of the Holy Spirit, and on Good Friday.
White vestments are worn
If you mean the liturgical vestment worn around the shoulders of priests as they administer the sacraments it is called a 'stole'.
A chasuble is a vestment worn by priests when they are saying mass. It is sleeveless, and is worn as an outer vestment. It is often quite decorated, and has the colors of the liturgical season. There is a link below to an article on the chasuble.
Catholic AnswerYes, according to the General Instruction of the Roman Missal, paragraph 337 requires that the priest who is celebrating the Mass be vested in a Chasuble. 337. The vestment proper to the Priest Celebrant at Mass and during other sacred actions directly connected with Mass is the chasuble worn, unless otherwise indicated, over the alb and stole.
Roman Catholic AnswerVestment usually refers to the chasauble worn by a priest or bishop when celebrating Mass; although in a broader way it can refer to any particular clothing worn by Christian clergy.
The white vestment worn by the priest is called an alb ( from the latin "albus", meaning "white"). It also worn by deacons, servers, and occasionally Eucharistic ministers. A white vestment placed over the alb at Mass is called a chasuble for priests and dalmatic for daecons. That can be red, green, violet, or white. White is worn during certain liturgical seasons and holy days, but the alb is always white, sometimes "off" white or ivory.
Neither. A priest celebrates a mass.
.Catholic AnswerFor Mass the Bishop wears the same thing that a priest does: alb, stole, cincture, chausable. The only thing different on a Bishop, he would be wearing a pectoral cross, a zuchetto and a miter.
Roman Catholic AnswerTo the best of my knowledge, none of the doctors of the Church died as martyrs, so their feast days would be white. If they did die as martyrs, the priest would be wearing red.
The lead Priest in a Mass is the Celebrant.
The priest said Mass.
The alb is the white tunic type of vestment which a priest wears over his street clothes and under the chasuble, which is the outer vestment, when he celebrates the Eucharist. The name comes from the Latin word for white. When celebrating Mass in an informal setting such as someone's home or when it is very hot, the alb can be worn without the chasuble. In either case a stole, the long, narrow garment similar to a Jewish prayer shawl, is worn symbolizing priestly authority.