Harmony and relaxation with Coloring-for-Adults.com: Guppy coloring page – modern online coloring by numbers and book for download and print for adults. Coloring helps adults look at the problem from a different angle. Switching between different modes, you can start painting again. Save the illustration or share the result with your friends. This can be done directly through the site: click “share”. Get inspired! Permission: Creative Commons Attribution-NonCommercial 4.0 License. Artist: Persimmons Studio.