On the third Sunday of advent, the pink candle, called the Shepherd's Candle is lit as a symbol of JOY, celebrating with exuberance that our Lord has taken away judgments against us and He rejoices over us with gladness.
The Lord, your God, is in your midst, a warrior who gives victory; he will rejoice over you with gladness, he will renew you in his love; he will exult over you with loud singing as on a day of festival. Zephaniah 3:17-18
The angels sang a message of JOY! "...and she gave birth to her firstborn, a son. She wrapped him in cloths and placed him in a manger, because there was no room for them in the inn. And there were shepherds living out in the fields nearby, keeping watch over their flocks at night. An angel of the Lord appeared to them, and the glory of the Lord shone around them, and they were terrified. But the angel said to them, "Do not be afraid. I bring you good news of great joy that will be for all the people. Today in the town of David a Savior has been born to you; he is Christ the Lord. This will be a sign to you: You will find a baby wrapped in cloths and lying in a manger." Suddenly a great company of the heavenly host appeared with the angel, praising God and saying, "Glory to God in the highest, and on earth peace to men on whom his favor rests." When the angels had left them and gone into heaven, the shepherds said to one another, "Let's go to Bethlehem and see this thing that has happened, which the Lord has told us about." (Luke 2:7-15)
We light the third candle because, like God's people centuries ago, we know that God has come in Christ and that Christ will come again. We rejoice in God's work in history and in the future. The pink color means joy!