I am looking to create a vibrant, rich purple colour for both buttercream and fondant. I have used Wilton's "Violet" gel colour and added it to my Fondx white fondant, only to have it turn a light blue hours later. So frustrating!
I make my buttercream icing with butter, milk, and powdered sugar (amongst a couple other ingredients), and the purple colour also fades!
How do I achieve this rich, vibrant purple in fondant and buttercream that I am looking for?
Thanks so much in advance!