The Berlin and Kay color theory, developed by linguists Paul Berlin and Kay Kay, proposes that human languages categorize colors in a predictable way. They identified a universal pattern in how cultures name colors, suggesting that as a language develops, it adds color terms in a specific order. For example, if a language has only two color terms, they will typically correspond to dark and light. Their research indicates that all languages eventually include basic color terms, such as red, green, and blue. This theory highlights the relationship between language, perception, and culture, suggesting that our understanding of color is influenced by linguistic structures.