not all languages have the same color terms.  If you give speakers of different languages a color spectrum and ask them to label when one color becomes another,  they will give different answers

Mankind’s perception of color, he says, increased “according to the schema of the color spectrum”: first came the sensitivity to red, then to yellow, then to green, and only finally to blue and violet. The most remarkable thing about it all, he adds, is that this development seems to have occurred in exactly the same order in different cultures all