Hi i need to make buttercream frosting in Barn Red to cover of course, A barn Cake.. can anyone suggest to me what colors to mix with white buttercream to get a true barn red color... thanks

super red, and a touch of brown, maybe a smidge or orange if needed

Use pink first and get your icing as pink as you possible can, then add No-Taste Red and then add your other reds/browns, etc. to get the color that you are going for.

Reds give a bitter taste, thus the need for pink and No-Taste Red first.