Because of the shared nature of the service the Enterprise has its own unique livery consisting of Dark Grey (NCS 8502-Y), Light Grey (NCS 5502-Y), Dark Green (NCS 9005-G20Y), Bronze strip & Enterprise logos (3M), and either Purple (NCS 5040-R40B) for Standard Class or Dark Red (NCS 4060-R10B) for First Plus.
In contrast, modern color systems such as the Natural Color System (NCS) are built upon a color space paradigm, providing for much more flexibility and wider range of applications.
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Other important color systems include the Swedish Natural Color System (NCS) from the Scandinavian Color Institute, the Optical Society of America's Uniform Color Space (OSA-UCS), and the Hungarian Coloroid system developed by Antal Nemcsics from the Budapest University of Technology and Economics.