CIE Chromaticity Diagram

The CIE chromaticity diagram represents a CIE XYZ color space projection to xyY and its approximated RGB color gamut defined by a working color space. The gamut boundary is based on CIE Standard Colorimetric Observer Data. Two sets of colorimetric data, CIE 1931 2° and 1964 10° observer data, are provided, from 360 to 830 nm, sampled at 5 nm.
Each working color space defines the coordinate values of primary and white point illuminants. These values are used to construct the conversion matrix from xyz to RGB and apply it in order to approximate RGB colors.
The whole gamut represents all the colors that human eyes can perceive. The working color space defines the system gamut, which is usually much smaller.


  • [Snapshot]
  • [Snapshot]
  • [Snapshot]


Different working color spaces use different types of white point chromaticities. The NTSC system uses "C". CIE color space uses "E", the CIE equal-energy illuminant. Other color spaces use "D65" (color temperature 6500K).
The "system gamut contrast" slider makes the colors outside of the gamut darker, so that the gamut will be more visible.
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.

Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-Step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2018 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+