How many colours can you get ball point pens in ?
Bic Sells 2 different sets of color in the 4-colored-pen format alone, Totaling 8 Basic colors. I’ve seen Cheep, Low Quality pens that have 10-colors each. So a special set of individual mid to high quality pens with that match or exceed that range are sure to exist.
Even so, many of the colors we precise in art and nature are merely the close proximity of two different colors. Order a regular (not white) raspberry mocha from Starbucks and pay attention to the overall color of the beverage to get my point.