Oh look this book still exists

This picture is a concept piece for a book I plan to eventually write. It's a species of air type dragon called the Beltane dragons, and it's possible variants. The top is a daytime, the middle is a nighttime, and the bottom is a sunrise/sunset variant. They don't have any different abilities or anything, it's just their coloring that makes them different. Idk if they'll make it into the book, or if I'll get to the book at all, but it's a thought