Online calculator of color difference and color brightness difference

Go to the online calculator

Source code is available.

Formulas used

Color brightness difference 

  ((Red value * 299)
+ (Green value * 587)
+ (Blue value * 114))
/ 1000

Color difference 

  (maximum (Red value 1, Red value 2)- minimum (Red value 1, Red value 2))
+ (maximum (Green value 1, Green value 2) - minimum (Green value 1, Green value 2))
+ (maximum (Blue value 1, Blue value 2) - minimum (Blue value 1, Blue value 2))

Other tools

The Contrast Analyser is a good desktop application (windows/mac, free).

Reference

 
 

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