Perfect Red Icing
Place the frosting into a mixing bowl.
Add about 1/2 tsp. of a red gel or paste food coloring for every one cup of frosting you have. Blend until you have a red color that is just a shade lighter than the shade you want the red to be.
Cover the bowl tightly with plastic wrap and place it in the refrigerator. Leave the icing overnight in the refrigerator. The red icing will darken overnight so that the next day the color will be the shade you wanted.