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Interesting question, I did some googling to find out what that condition is called.
Apperently it's called Rod Monochromatism or Complete Achromatopsia, happens in 1 of 33,000 in the USA, but you couldn't make this up:

In the western Pacific, however, there is a small island of Pingelap that has a high incidence of achromatopsia. This population has been studied significantly because of this condition. Through genealogy, it was traced back to 1775 to one man who survived a typhoon which killed most of the islands residents. This man had a mutation of the CNGB3 gene which is essential in the eye’s photoreceptors and ultimately vision. He passed this gene on to  family members who have subsequently been affected by achromatopsia. Today, 6% of the population of this small island has the condition.
http://www.eyeassociates.com/understanding_achromatopsia.htm

Help you perceive color with your eyes would be impossible, unless you wear some fancy glasses that automatically label color with textures or tags.

To explain color, you could use temperature. You can't see if something is hot or cold, but a thermometer can. With infrared goggles you can see temperature. Now imagine you have heat vision build in. It would be hard to imagine ofcourse, like imagining being able to see a 4th spatial dimension.