I know this is off-topic, but since someone else brought it up here...
I'm fascinated with the color mixing swatch books that some art teachers have their students prepare. They range from small and fairly simple, to huge and complex, depending on the number of colors in your palette and the number of steps you take in your shades, tints, and mixes. The book I made in school years ago is packed away somewhere, but my color palette (for when I eventually start painting again) has changed considerably since then. So, the new book I want to make will be several inches thick, painted on canvas pages roughly 6 by 18 inches. If you don't know exactly what such a book might look like, I found a good example of some pages when I googled "color mixing swatch book".