About

CIELAB ¹⁾ is a human color spaces reference standard that was specifically designed to encompass all colors the average human can see. (As CIEXYZ)

CIELAB is also known as L*a*b* where:

• L* stands for perceptual lightness,
• a* and b* for the four unique colors of human vision: red, green, blue, and yellow.

Function

• d3: lab
• css: relative lab