Is the ∆E (Delta E) calculation for the color lookup based on CIE L*a*b* or CMC? Boris Bergmann August 31, 2021 13:36 The ∆E (Delta E) calculation is based on CIE L*a*b* D65/10° Related articles What does the Triangle number mean? What is the general life of the ColorReader and its battery? Why is my ColorReader PRO only displaying Lab values for the measured colors on the internal screen? I am getting Invalid Calibration on my ColorReader / ColorReader EZ / ColorReader PRO and my colors are coming wrong What fan decks are available in North/South America, in Europe and in Asia on the ColorReader / ColorReader EZ / ColorReader PRO that sold by Datacolor or Amazon?