Blue–green distinction in language being described. For example, "blue" and "green" might be distinguished, but a single term might be used for both if the color is dark. Furthermore, green might be associated with yellow, and blue with black or gray. According to Brent Berlin and Paul Kay's 1969 study "", distinct terms for brown, purple, pink, orange and grey will not emerge in a language until the language has made a distinction between green and blue. In their account of the development of color terms the first terms to emerge are those for white/black (or light/dark), red and green/yellow. The word for blue
Christ Church School 12. Kindergarten students wear Persian coloured checked shorts, and a Persian blue shirt attached to the shorts, while girls wear Persian blue dress. Boys, up to the 7th grade, wear white shorts, white half-sleeved shirts, school belt, black shoes, and the school tie (which is dark bottle green with a thin yellow stripes running diagonally). The students usually pin a badge of their house name (and the house colour on the background) to their tie or their pockets. From the 8th grade onwards, boys wear full white trousers, a white half- sleeved shirt, the green and yellow striped school belt