Through The langauge Glass Summary 4:

This chapter talks about color and how some language still could not distinguish between green and blue. In Burma, Tagalog speakers in Philippines does not recognize the color blue because blue to them is green. Teda tribe in Chad still did not distinguish green from blue at all. The chairman of the Berlin society for anthropology, ethnology, prehistory was trying to find out more about how a society or a region sees colors and how they are different. The Nubians from Sudan were shown the color blue, they were asked what color they see, and some say the color blue was black and other said green. Also the colors yellow, green, and gray all three colors are described by the same word. W.H.R Rivers a psychiatrist did research on colors and “how the color vision of the natives related to their vocabulary and weather the capacity for appreciating differences correlated with the power of expressing those differences in language.”(Deutscher 65-66). Rivers found out that these people were not colorblind, and knew the difference between colors but did not have names for them. "' seemed almost almost inexplicable, if blue were not to these natives a duller and a darker colour than it is to us.'"(Deutscher 67).  Europeans are better at telling the difference between blue and green then that of the natives.