The interchange and printing of digital color images is not as simple as one might naively believe. It is much more than specifying a set of RGB or CMYK code values. Each input and output device will have its own unique color characteristics; therefore the same RGB values will correspond to different colors on different devices.
Kevin E. Spaulding,
"Digital Color Management: Encoding Solutions, by Edward J. Giorgianni and Thomas E. Madden," Journal of Electronic Imaging 8(2), (1 April 1999). https://doi.org/10.1117/1.482691