# Delta-E Calculator

Rgb
0 to 255
0 to 255
0 to 255
Cmy
0 to 1
0 to 1
0 to 1
Cmyk
0 to 1
0 to 1
0 to 1
0 to 1
Hsl
0 to 360
0 to 100
0 to 100
Xyz
0 to 1
0 to 1
0 to 1
CIE-L*ab
0 to 100
-128 to 128
-128 to 128
CIE-Lch
0 to 100
0 to 100
0 to 360
Yxy
0 to 100
0 to 1
0 to 1
Rgb
0 to 255
0 to 255
0 to 255
Cmy
0 to 1
0 to 1
0 to 1
Cmyk
0 to 1
0 to 1
0 to 1
0 to 1
Hsl
0 to 360
0 to 100
0 to 100
Xyz
0 to 1
0 to 1
0 to 1
CIE-L*ab
0 to 100
-128 to 128
-128 to 128
CIE-Lch
0 to 100
0 to 100
0 to 360
Yxy
0 to 100
0 to 1
0 to 1
Calculation Results

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### Using the Calculator

Enter values for your chosen color spaces and we'll calculate delta-e for you using the Cie76 algorithm. A result less than 2 is generally considered to be perceptually equivalent.

Supported color spaces include Rgb, Cmy, Cmyk, Hsl, Xyz, CIE-L*ab, CIE-Lch, and Yxy.

Note: This calculation is Quasimetric, the result may vary based on which value you enter first!

Other delta-e calculators

### What is Delta-E?

Delta-E is a single number representing the "distance" between two colors.

It's tempting to simply compare the euclidean distance difference between the red, green and blue aspects of an rgb.

Unfortunately for us rgb was intended for convienient use with electronic systems, however it doesn't align with how we actually perceive color.

Testing this method quickly reveals sporadic and often drasticly different results than one would expect of visually "similar" colors.

Enter CIE76...

Over the years, people much smarter than I have devised many ways to calculate the perceived difference in color.

The most popular method is known as CIE 1976, or more commonly just CIE76.

This method uses the aforementioned euclidean distance, however the trick is to first convert to the CIE*Lab color space.

Both the CIE*Lab color space and Cie76 delta-e have they're detractors however, so we recommend doing your own research to figure out which method is right for you.

Other common methods include...

### The Math

C# Code for Cie76

Delta-E calculations performed using the open source ColorMine library.

## ColorMine.org is Proudly Sponsored By:

If you're into color, color theory or design you should definitely check out the award winning Nix Color Sensor. It really is a game changing tool.