Ed Piskor sez, "I located an 'antique' chart of the exact mixtures for the 64 colors which were used in comics and newspaper strips for decades and I created a PSD file to share so that people can use these hues digitally. It's sort of a tool that also will remind guys to practice some restraint when doing their own work. I can't think of a reason anyone would need to use thousands of colors on a page, but a lot of colorists insist on it. Forward this to your illustrator friends."
old comics 64 color guide PSD (ZIP file) (Thanks, Ed!)