CIELAB Color Space

The CIELAB (CIE L*a*b*) color space was introduced by the International Commission on Illumination in 1976.^1,24 It is a three-dimensional color space consisting of three variables: L, a, and b (Fig. 8). The “L” factor indicates the lightness of an object, the “a” factor assesses redness (positive value) or greenness (negative value), and the “b” factor determines yellowness (positive value) or blueness (negative value).^1,24 The “L” in the CIE system corresponds to the value (V) in the Munsell color order system.²⁴ The advantages of this system include its consistency and reproducibility.³ Additionally, it enables quick and efficient communication with laboratories.³ Digital color measuring devices currently use the CIELAB system for color measurements.^1,24

Fig. 8 - CIELAB color space (occlusal view)

Fig. 8 - CIELAB color space (occlusal view)

Image: Holger kkk Everding, CC-BY-SA-4.0