light
innocence
purity
joy
triumph
glory

White

Season of Christmas
Season of Easter
Feasts of the Lord, other than of His passion
Feasts of Mary, the angels, and saints who were not martyrs
All Saints (1 November)
Feasts of the Apostles
Nuptial Masses
Masses for the dead (Requiem Masses) when the deceased is a baptized child who died before the age of reason

Note: White is the color of Popes’ non-liturgical dress. White can be replaced by Silver.

the Passion
blood
fire
God’s Love
martyrdom

Red

Feasts of the Lord’s passion, Blood, and Cross
Feasts of the martyrs
Palm Sunday
Pentecost

Note: Red is the color of Cardinals’ non-liturgical dress

the Holy Ghost
life eternal
hope

Green 

Time After Epiphany
Time After Pentecost

penance
humility
melancholy

Violet 

Season of Advent
Season of Septuagesima
Season of Lent
Rogation Days
Ember Days (except for Pentecost Ember Days)
Vigils except for Ascension and Pentecost
Good Friday

Note: Violet, literally “amaranth red,” is the color of Bishops’, Archbishops’, and Patriarchs’ non-liturgical dress

mourning
sorrow

Black 

All Souls Day
Masses for the dead (Requiem Masses), except for baptized children who’ve died before the age of reason

joy

Rose

Gaudete Sunday (Third Sunday of Advent)
Laetare Sunday (Fourth Sunday of Lent)

joy

Gold

Gold can replace white, red, or green (but not violet or black)