>the Wikipedia article on ColorChecker[2] has a listing of the exact colors in the ColorChecker That's only exact under CIE Illuminant C lighting, which approx

>the Wikipedia article on ColorChecker[2] has a listing of the exact colors in the ColorChecker That's only exact under CIE Illuminant C lighting, which approximates overcast outdoor lighting. Most indoor lighting has a lower color temperature than this, and in the case of LED/fluorescent lighting, a more uneven spectrum. To accurately duplicate the colors of a ColorChecker under all lighting conditions, you need the full color spectrum of each panel. Wikipedia links to a web site with this data: https://babelcolor.com/colorchecker.htm https://babelcolor.com/colorchecker.htm