The Himba tribe of Namibia cannot see the color blue (same tribe that Nike studied about running long distances). They are an isolated tribe that can't see blue ... The study included presenting a chart with 10 boxes where 9 boxes were green and 1 was blue but all boxes had the same hue (reasonable value that we can easily differentiate); and the entire village couldn't identify 'the one box that was different from the others'. They relocated an orphan newborn to another tribe and the child easily identified the color blue proving it wasn't genetic. It's weird how all the videos about it have been deleted. It was presented on a TED Talk and an unrelated National Geographic episode. A linguist on TED Talks did a whole talk on how vocabulary defines what we see. I wonder if this was a correction and hence, the removal.
They cant see the color blue and we cant see hue in green