What is the LAB color space?

CIE LAB is a color model designed to approximate human vision. L* represents lightness, a* represents the green-red axis, and b* represents the blue-yellow axis.

Why use LAB instead of RGB or HSL?

LAB is perceptually uniform, meaning equal numeric differences correspond to equal perceived color differences. This makes it ideal for color comparison and color grading.

What white point does this tool use?

The conversion uses the D65 illuminant, which is the standard for most digital imaging and CSS color specifications.

What is a typical range for the a* and b* values?

Both a* and b* typically range from about -128 to +127 for colors within the sRGB gamut, though the LAB space itself is unbounded.

HEX to LAB Color Converter (CIE Lab*)

Enter a HEX code and get the L*, a*, b* values in the CIE LAB color space.

Color

Summary

Enter a HEX code and get the L*, a*, b* values in the CIE LAB color space.

How it works

Enter or paste a HEX color code
Read the L*, a*, b* values
Use the values in color science or ICC profile work

Use cases

Measure perceptual color difference (delta-E)
Color-match across different devices and media
Academic or research color analysis

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu

HEX to LAB Color Converter (CIE L*a*b*)