Hello and thank you for all you give, I am following and interested if you have seen any of the art of St John's Bible recently completed. I travel to see pages when ever I can, Santa Fe has the best exhibit. I am going to study and make art using the Bible at The St John's Abbey in July, an old way of praying Visio Divena. I will be using materials new to me. But I will be using your color wheel, I am making one to travel with. I will be using ink, gouache and casin, vellum. I will post the color wheel when finished for guidance.
My best,
Anne

Hi Anne, what pigment will you be using for your transparent yellow in the color wheel. In the 1800's they were using Orpiment or Original Indian Yellow.
Transparent yellow is necessary if your are only using 3 primaries, that will give you bright reds and greens. Opaque or translucent yellows will give you a chalky red. Otherwise you can use the primary and secondary colors together.