The liturgical color of Advent is purple. It represents our self-examination: am I ready to receive Jesus when he comes?
The liturgical color for Christmas is white. It represents our joy that the Word of God has become one of us.
The litrugical color of Ordinary Time is green. It represents our growing in the spiritual life from day to day.
The liturgical color of Lent is purple. It represents our sorrow for sin and our pleading for God's mercy.
The liturgical color of Easter is white. We rejoice that the Lord has risen and he promises us eternal life.