Why are red and green the colors of Christmas? No one really knows for sure, but there have been plenty of educated guesses. Green is the easier of the two to theorize about, because it’s the color of the evergreens that symbolize so much that is important to the meaning of the holiday. The holly berry seems to be responsible for the color red, as it’s the red berry that lives through winter, symbolizing life in the face of death, and thus representing Christ.