The dalmatic is a long wide-sleeved tunic, which serves as a liturgical vestment in the Roman Catholic, Lutheran, Anglican, and United Methodist Churches, which is sometimes worn by a deacon at Mass or other services. Although infrequent, it may also be worn by bishops above the alb and below the chasuble. Like the chasuble worn by priests and bishops, it is an outer vestment and is supposed to match the liturgical colour of the day.