The color systems
The CIEXYZ system used in paint, plastic, and textile industries
The Judd-Hunter Lab solid where L = lightness or darkness , +a = redness, -a = greenness. +b = yellownessand -b = blueness. Used in food industries
The CIELAB system with parameters L* a* b* . Used in food industries
The CIELCH system with parameters L* C* H*.