Some fellows named Berlin and Kay put forward a colour term development hypothesis/theory: > Basic Color Terms: Their Universality and Evolution (1969; ISBN 1-

Some fellows named Berlin and Kay put forward a colour term development hypothesis/theory: > Basic Color Terms: Their Universality and Evolution (1969; ISBN 1-57586-162-3) is a book by Brent Berlin and Paul Kay. Berlin and Kay's work proposed that the basic color terms in a culture, such as black, brown, or red, are predictable by the number of color terms the culture has. All cultures have terms for black/dark and white/bright. If a culture has three color terms, the third is red. If a culture has four, it has either yellow or green. * https://en.wikipedia.org/wiki/Basic_Color_Terms https://en.wikipedia.org/wiki/Basic_Color_Terms * https://en.wikipedia.org/wiki/Linguistic_relativity_and_the_color_naming_debate https://en.wikipedia.org/wiki/Linguistic_relativity_and_the_... * https://en.wikipedia.org/wiki/Blue–green_distinction_in_language https://en.wikipedia.org/wiki/Blue–green_distinction_in_lang...