Type RGB values and instantly get CIE L*a*b*. See HEX, RGBA and HSL side by side. Click any format to copy.
✓ Accepts: 255, 128, 64 or rgb(255, 128, 64) or paste from anywhere
Everything runs in your browser - no colors are ever uploaded
Click any code - HEX, RGB, HSL or LAB - and it's copied instantly, with a quick confirmation.
See HEX, RGBA, HSL and LAB for the same color side by side, no extra clicks.
Type R, G, B separately, paste "rgb(255,128,64)" as a whole string, or use the picker and eyedropper.
No sign-up, no watermark, convert as many colors as you like.
Type R, G, B values directly, or use the color picker and eyedropper.
HEX, RGBA, HSL and LAB values appear instantly below the preview.
Tap any code and it's copied straight to your clipboard, ready to paste.
RGB is first converted to linear RGB, then to CIE XYZ using the sRGB matrix and the D65 reference white, and finally to CIE L*a*b*. L* is lightness from 0 (black) to 100 (white), a* runs from green (negative) to red (positive), and b* runs from blue (negative) to yellow (positive). For example, RGB(124, 58, 237) is roughly lab(43, 65, -79). This tool does the math automatically.
Enter your RGB values in any common format: rgb(255,128,64), 255, 128, 64, or 255 128 64. The tool is forgiving with spacing and punctuation. You can also use the color picker.
No. Every conversion happens locally in your browser. Nothing you type or pick is sent to a server.
Yes - use the LAB to RGB converter for the reverse direction, or any of the other format converters linked below.
LAB is designed to match human perception, so equal numeric distances in LAB roughly correspond to equal perceived color differences. That makes it useful for measuring color accuracy, checking print consistency, and comparing colors across devices - something RGB and HSL were never designed for.
No. Convert as many colors as you like, for free, with no account required.