This is not a disability in the same way as color blindness(though that can be part of it), it is more of a lack in vocabulary or interest.
This condition is found mostly in men, and can be spotted when they refer to teal as green, tangerine as orange, or azure as blue.
Boyfriend: "Hey look over there, that guys picking his nose."
Boyfriend: "In that red car."
Girlfriend: "That car is burgundy."
Boyfriend: "Sorry I'm Crayola blind."