Research indicates that the evolution of words used to describe colour follows a relatively standard path. Human cultures first develop words such as “dark” and “bright” to describe corresponding colour-types; then they develop the word “red”. After this, there is greater variation in linguistic practice, but typically red is followed by the following: first green, then yellow, then blue. After this comes terms for black, white, red, green, blue and yellow. As languages become more sophisticated, they adopt terms to describe brown, orange, pink, purple, gray, and finally azure.