Cie Color Model - Sharp AR-C360P Reference Manual

A
A-90 Desktop Color Primer

CIE color model

In the 1930s, the Commission Internationale de l'Eclairage (CIE)
defined a standard color space, a way of defining colors in
mathematical terms, to help in the communication of color
information. This color space is based on research on the nature
of color perception. The following CIE chromaticity diagram is a
two-dimensional model of color vision. The arc around the top of
the horseshoe encompasses the pure, or spectral, colors from
blue-violet to red. Although the CIE chromaticity diagram is not
perceptually uniform—some areas of the diagram seem
to compress color differences relative to others—it is a good tool
for illustrating some interesting aspects of color vision.
By mixing any two spectral colors in different proportions, we can
create all the colors found on the straight line drawn between
them in the diagram. It is possible to create the same gray by
mixing blue-green and red light or by mixing yellow-green and
blue-violet light. This is possible because of a phenomenon
peculiar to color vision called metamerism. The eye does not
distinguish individual wavelengths of light. Therefore, different
combinations of spectral light can produce the same perceived
color.
Sharp AR-C360P EFI Color Reference Guide - 90