Like everything else on this site these come with NO guarantees and NO free support. Use them at your own risk. Updated June 2017

Spreadsheets and charts

Useful Formulae (21 K .xlsx)
Some handy color conversion formulae derived primarily from "Measuring Color" by Robert Hunt. NO GUARANTEES OF ACCURACY - any errors are probably ours, not Hunt's. Buy the book if you want to be sure.


For additional color science math visit

RGB coords (132 K .xls)
Play with phosphor coordinates and visualize them on a CIEY,x,y diagram. Compare the gamuts of different RGB working spaces. You will need some fluency in Microsoft Excel to use this.

Added March 2006: "Ekta Space PS5, J. Holmes" (copyright 1998, Joseph Holmes, Follow the link for Joe's informative Read-Me and magnificent web gallery.

Back to top

DeltaE 76 and 2000 calculator
Simple spreadsheet for calculating the two most common versions of Delta E.
Use at your own risk.

De calculator

Back to top