How many pencils will my readers need for the whole book?

With a named palette, the pattern pages all use the same first colors of it (4, 6 or 8 by who colors it). Mystery pages and photo pages take the colors of their own picture, so across the book they can use more of the 21 named colors. To keep the whole book to one set your readers can buy, use "My pencils": every page, mystery and photo pages included, is then colored only from your pencils.