DIN Standard DIN 47100 regulated color-coding for identifying cores in telecommunication cables using solid or striped colors, though it was withdrawn in 1998, the standard remains in widespread use. The CIE color model is a 3D color space created by the International Commission on Illumination to accurately map and reproduce any color visible to the human eye using tristimulus values that combine red, green, and blue.

1. DIN
• DIN Standard DIN 47100 regulated
the color-coding for the
identification of cores in
telecommunication cables. The
standard was withdrawn without a
replacement in November 1998,
but remains in widespread use by
cable manufacturers.
• The isolations of the several wires
in a cable are either solidly
colored in one color, or striped
lengthwise in two colors. Use of
the three-colored wires numbered
45 and up is rare.

2. CIE Color system
• The CIE color model is a color space
model created by the International
Commission on Illumination known as
the Commission Internationale de
l’Elcairage (CIE). It is also known as the
CIE XYZ color space or the CIE 1931 XYZ
color space.
• The CIE color model is a mapping system
that uses tristimulus (a combination of 3
color values that are close to
red/green/blue) values, which are
plotted on a 3D space. When these
values are combined, they can
reproduce any color that a human eye
can perceive. The CIE specification is
supposed to be able to accurately
represent every single color the human
eye can perceive.