Question: why is the liturgical colour of advent purple

title: Liturgical colours
text: Ember days Rogation days Vigil of St. Andrew Vigil of St. Thomas Vigil of Christmas Holy Innocents ( when this falls on a weekday ) Purification ( Blessing of Candles and Procession ) Vigil of St. Matthias ( in leap years only ) Septuagesima , Sexagesima , and Quinquagesima Palm Sunday ( Blessing of Palms , Procession , Mass ) Holy Saturday ( pre-Mass blessings and rites ) Vigil of Pentecost ( pre-Mass blessings and rites ) Vigil of the Nativity of St. John the Baptist Vigil of St. James Vigil of the Assumption Vigil of Sts . Simon and Jude Vigil of All Saints All Souls ( during the Forty Hours ' Devotion only ) Sacrament of Baptism ( Introductory rites and Exorcism )