In small bowl, mix 1 1/2 cups frosting and yellow food color. In another small bowl, mix 1 1/4 cups frosting and orange food color. Leave remaining frosting white. Spoon each color frosting into separate quart-size resealable food-storage plastic bag; seal bags. Cut off 1/2-inch corner of bags; squeeze bags to pipe frosting in layers on cupcakes to look like candy corn. Decorate with candy sprinkles.