Coloring by numbers is not only a childish thing to do. This game can also be played by adults with an even harder challenge and patterns of the coloring sheet. This time we have a new set of printable color by numbers for adults that you can print and play for your quality time or share with your friends. There are plenty of coloring pages, and all you need to get started are a printer, crayons or colored pencils, and some decent paper. Check out the pages in the images below.