Pudding colour theory

So I decided to make myself some Butterscotch pudding today. I chose Butterscotch because I believe it is a flavour that is greatly unappreciated in the sweet food world.

The strange thing about this treat was the powder.

It was purple and it changed to its light brown colour when the milk made contact. Now I’m no colour expert but I’m pretty sure purple and white do not make brown.

CC