Color constancy is reached by chromatic adaptation. The Global Fee on Illumination defines white (tailored) as "a shade stimulus that an observer that's [chromatically] tailored towards the viewing surroundings would decide being properly achromatic and to have a luminance element of unity. /information /verifyErrors The phrase in the example sentence https://blackpalmcockatoo56938.blogpixi.com/36098568/helping-the-others-realize-the-advantages-of-sulphur-crested-cockatoo