4 August 1993 Apple color management system (ColorSyncTM)
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Before ColorSync, the QuickDraw graphics model had no specific means to define device independent color. That is, colors in QuickDraw were defined in terms of RGB values without reference to a specific, objective definition of RGB. This means that devices have no way of knowing how to interpret the incoming RGB values. When QuickDraw asks for a red value of 300, say, it asks the device to output 300 / 65536 of full red. The problem is that the full red has not been defined, so the color is relative to the full red of the destination device. The end result is that the same color triplet imaged on different output devices looks different. Without the capability of device independent color definition, achieving consistent color across varying devices is impossible.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gerald M. Murch, Konstantin Othmer, Steve Swen, "Apple color management system (ColorSyncTM)", Proc. SPIE 1909, Device-Independent Color Imaging and Imaging Systems Integration, (4 August 1993); doi: 10.1117/12.149043; https://doi.org/10.1117/12.149043

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