Preheat the oven to 350 F. In a large bowl, mix together cake mix, eggs, and vegetable oil until smooth. Divide the cookie dough into three bowls, mix one with purple food coloring, one with orange, and one with green.
Fold butterscotch chips into each cookie dough. Take a small amount of each cookie dough and roll together into balls. Place cookies onto a large ungreased baking sheet at least 2-inches apart. Bake for 10-12 minutes.