LAB Color Converter

Compare perceptual LAB coordinates with familiar HEX/RGB output using the standard sRGB D65 reference white.

HEX color

Preview

—L*

—a*

—b*

—sRGB HEX

D65 sRGB / CIELABConversion uses the sRGB D65 reference white. LAB values outside the sRGB gamut are clipped when converted back for display.

LAB Color Converter: Delta E & Gamut Evidence

Cross-check LAB conversion with Delta E 76 against a comparison color, gamut status and D65/sRGB round-trip evidence.

Quick-win evidence

Compare HEX

Color and accessibility boundaries

HEX/RGB/HSL/HSV/OKLCH conversions are numerical color-model operations. CMYK output is an RGB-derived approximation rather than ICC-profiled print proofing. WCAG contrast ratios measure luminance contrast only and do not certify a full interface. Color-blindness previews are design simulations, not medical tests.

How to use the LAB Color Converter

Convert a display sRGB color to CIE L*a*b*, or enter D65 LAB coordinates and view the nearest clipped sRGB display result.

Method and limit

The conversion uses the standard sRGB transfer curve, XYZ, and D65 reference white. LAB colors can exist outside the sRGB gamut, so reverse conversion may clip channel values for display.

Practical guide and verification

Use the interactive product above first. These notes add interpretation, verification and limits below the results and product controls.

CIELAB values depend on the reference white and RGB assumptions

The page uses the stated sRGB/D65 path. LAB values from a different RGB profile, illuminant or adaptation method may not match numerically, so record the color space assumptions when exchanging values with design or print systems.

Out-of-gamut LAB colors cannot map perfectly into sRGB

Some valid LAB coordinates describe colors outside the sRGB gamut. When converting back, inspect the gamut evidence and preview rather than assuming the displayed RGB value preserves the original color exactly.

Delta E is a difference metric, not a universal acceptability rule

A numeric color difference becomes meaningful only with a chosen Delta E method and application-specific tolerance. Screen design, brand matching and print quality can use different thresholds and viewing conditions.

Round-trip RGB → LAB → RGB as a conversion check

For an in-gamut sRGB color, converting to LAB and back should return very close RGB values apart from rounding. A large drift can reveal gamut clipping, different white-point assumptions or a transcription error.

Display previews are device dependent

The browser can display an sRGB preview, but monitor calibration, brightness, ambient light and operating-system color management affect appearance. Use numeric values plus a controlled display or physical proof when color matching is critical.