I am planning on making a 2 tiered cake and cupcakes for my son's birthday. Since it's Elmo themed I am going to use bright primary colors (red, blue, green and yellow) for the buttercream (attaching a picture of the colors). I know getting icing colors this rich makes them bitter. I saw an episode of DC Cupcakes where they used some blended fruit to help start the colors before adding the gel colors which also was supposed to help the flavor. Does anyone have experience with this and any suggestions on how to do it for these colors?
Thanks!!

Red and black can get bitter because it does take a lot of color to make them, but I generally don't have that problem.

When you need bold colors the best thing to do is start ahead of time with coloring your icing. The colors will deepen after sitting and you will not need to add as much color this way.

Some on here will tell you to get Americolors, but I haven't have problems getting the deep colors with my Wilton colors.