A Description of Cerebral Achromatopsia
Unfortunately, not only does the condition wipe out the ability to see any colors in the world but it also seems to wipe an individuals ability to recall the colors of simple objects. This is a task that is achieved in most humans by "imagining the relevant object in color" (Bartolomeo, 1998). However, in individuals with cerebral achromatopsia, the ability to even recall colors is lost so they are unable to give specific colors to the objects they see, regardless of if they have seen it in the past or not (Bartolomeo, 1998).
Currently, there is no known treatment for this condition so patients with it simply tend to learn to adapt their lives to become a life in black and white.
Rohit Balaji