This kind of question is made absurd by our current understanding of evolution and eye physiology. The ability to see a spectrum of colors was developed millio

This kind of question is made absurd by our current understanding of evolution and eye physiology. The ability to see a spectrum of colors was developed millions of years ago. Ancient Greeks being able to only see 3 colors would require a sudden and complete change in eye physiology, followed by its miraculous recovery a few centuries later.