What colors can humans not see?

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Tags

  1. #limitation
  2. #pairs
  3. #first
  4. #human
  5. #whose
  6. #supposed
  7. #other
  8. #forbidden
  9. #color
  10. #perceive
  11. #colors
  12. #impossible
  13. #place
  14. #cancel
  15. #light
  16. #frequencies
  17. #simultaneously
  18. #called
  19. #results
  20. #composed
  21. #automatically
  22. #green
  23. #yellow