Pink is a Primary Colour

This is an old photo but I had to find something that properly illustrated this comment by Ella the other day. We'd been doing a lot of painting in the morning, with plenty of experimenting with creating different colours by mixing things together. This involved a lot of messy paint and a lot of questions "How do you make green?" "How do you make purple?" etc. Many green and purple spots later, we were up to "how do you make red?", which led to "red is a primary colour." Later at dinner colour mixing resurfaced in the conversation and I asked Ella "how do you make pink?." Ella says, "Pink is a primary colour" and Edward says "Yes, for you Ella that is certainly true."