Color constancy is obtained by chromatic adaptation. The Intercontinental Commission on Illumination defines white (adapted) as "a colour stimulus that an observer who is [chromatically] adapted on the viewing setting would decide for being perfectly achromatic and to have a luminance issue of unity. Many of the gentle sources that https://elliottiagkl.madmouseblog.com/16387673/the-ultimate-guide-to-sulphur-crested-cockatoo