RePaint, a resin-based 3D printer that renders reproductions in color four times closer to the original than the next-best tool, utilizes a palette of 11 different inks: cyan, magenta, yellow, black, green, blue, orange, red, violet, transparent white and opaque white. Comparatively, traditional 2D printers typically operate in CMYK, or cyan, magenta, yellow and black, which is the keyline color. – Smithsonian