The traditional colors of the New Orleans Mardi Gras are purple, green, and gold. All three colors were used by the Catholic Church throughout history and thus continued to be used in relation to Mardi Gras which was Catholic in origin. (from Wiki) Gold color symbolizes power and authority. Green color symbolizes destiny while Purple color is justice.
For Fastelavn children line up during the festivities to hit a barrel which hides a lot of candy inside. Scandinavian style pinata. Whoever hits the last of piece of the barrel will be crowned cat king or cat queen and put on a crown for the rest of the day. The kids will dress up and visit the neighbors and sing " Fastelavn is my name, buns I want. If I get no buns, I will make trouble. Buns up, buns down buns in my tummy. If I get no buns, I will make trouble."
The symbolic action of throwing beans is known as mame-maki, and is done to drive out demons and invite good luck for the new year. While throwing beans, the family will yell “Oni wa soto (Demons out), fuku wa uchi! (Happiness in)” Some believe that eating the number of beans equal to their age will bring them health and happiness. (means drive away evil matter)
This custom dictates eating a large (uncut)sushi roll in total silence while facing in a lucky direction, the direction is determined by the year’s zodiac sign. Roll up seven ingredients for the seven gods of happiness. In 2016, the lucky direction is south-south-east. Thanks Kyotofoodie Have fun!