Color Checker
thingiverse
I made this color checker because I could not find one online for a reasonable price. You can use this to verify that the color on your palette corresponds correctly to the color you wish to use for your painting.
Download Model from thingiverse
With this file you will be able to print Color Checker with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Color Checker.