How Many Colors Can We See?

Quick Questions cracks the code of color vision, color blindness, and even newly discovered sort of technicolor vision!
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Sources:
http://www.simoneye.com/blog/how-many-colors-do-we-actually-see

http://discovermagazine.com/2012/jul-aug/06-humans-with-super-human-vision

http://www.colourblindawareness.org/colour-blindness/

http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001997/

http://genetics.thetech.org/ask/ask349

http://academic.evergreen.edu/curricular/anp07/Looking%20for%20Madam%20Tetrachromat.htm

http://micro.magnet.fsu.edu/primer/lightandcolor/humanvisionintro.html