Would blue or purple Wilton food coloring gel show up in a chocolate cake

Question

Would blue or purple Wilton food coloring gel show up in a chocolate cake

Answer 1

 I have a question does anyone know how to make Watermelon Icing. I am making a Bridal Shower cake for my step daughter. I took the courses. Know how to mix the colorings and stuff just never had to get Watermelon color. My stepdaughter picked Watermelon for the color of the girls dresses and that is the colors I need for the Roses and trace around the umbrella