To make purple color, in small bowl, mix 5 drops blue food color and 5 drops red food color. Drop purple color along top of fish. Drop 6 drops blue food color along center and 6 drops yellow food color along bottom. Starting from top edge of fish, blend colors into frosting with small spatula or spoon, working purple down into blue and blue down into yellow. Use back of spoon to form scales. Define lips with edge of spatula. Mark tail and fins with fork. Use candy for eye. Store loosely covered.