I cannot get my frosting purple, its just gray. Used americolor red and regal purple, even tried adding a pinch of baking soda to a sample bowl. Nothing.
Nevermind, figured it out. It WAS the frosting PH. I had tried a pinch of baking soda, but out of frustration when I added a ton of baking soda to a sample, it purpled right up, but of course, tasted horrible. So to add something basic that actually tasted good, I made a thick batter out of water and powdered creamer and added it the batch. It's purple now! Haha so weird.