By: Shamima Sultana

In reply to 1.

Hello,

Thank you for pointing that out! Yes, the method shown in the article uses the ΔE from the 1976 (CIE76) formulation.
You are correct that the current industry standard is ΔE 2000 (CIEDE2000), which provides a more accurate measure of color difference.
For advanced applications, it’s better to use the DE 2000 calculation.

Regards
ExcelDemy