Each liturgical season has a special color assigned to it that determines what color the priest and deacon’s vestments are and also to determine how the church is decorated. Here is a basic list of the colors:
White: White is used for all the feast days and during the Christmas and Easter seasons.
Red: Red is used on Palm Sunday, Good Friday and Pentecost. It is also used when we celebrate the feast day of a Martyr.
Green: Green is the color of ordinary time.
Violet or Purple: Purple is used for both the Advent and Christmas seasons.
Rose: Pink (or Rose) is used only twice in our liturgical year, on Guadate and Laetare Sundays.