In precise color communication, colors are expressed numerically. The color numbers are coordinates of a 3 dimensional color space. In design and manufacturing, the CIE L*a*b* and L*C*h color spaces are used in a client and supply chain to ensure product compliance.
In the L*a*b* color space, L* indicates lightness – lighter or darker and a* and b* are color directions:
- +a* is the red axis
- -a* is the green axis
- +b* is the yellow axis
- -b* is the blue axis
For L*C*h color space, the C* is the chroma axis and h is the hue angle.
CIE L*C*h color space is a vector representation of the CIE 1976 L*a*b* color space. Hue angle (h) can be used as a guide to differentiate ripeness. For instance, fruits like tomatoes, goes from green to yellow to red. The hue angle travels from 180° to 0°. Peanut oil ranges from 75° to 105° and the hue angle is a guide in getting the color rights.
Write to us for a free consultation with our color specialists to learn and understand more on color spaces and how to use them for your work.