Great simple book about colours but even more wonderful as a resource to teach toddlers and older children about generic animal body language for other animal species eg dogs.
Specifically the double page spread with the orange and purple dinosaurs.
For example, if you're loud and imposing (illustrated through orange dinosaur), it may make another animal or person scared (purple dinosaur) who may try to get away or make itself as small as possible/tail between legs etc.
Love and use this book all the time teaching children about animal behaviour and non-verbal communication.