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

 
 

Feedback

hi
tyrone lowe
Sep 28, 2010
#1
this color diffrence is really weird and "HI" to you too tyrone lowe
CrazyMe #13
Jan 10, 2011
#2
This is a cool tool for working out similarities between colours on the web. I've been comparing colors of photos of balls of wool to the pantone fashion forecast colours to finf bast matches. I guess I could copy and paste the images into Gimp, but this seemed easier.
Samantha
Sep 15, 2011
#3