Why Is the Term "Color Blindness" Usually a Misleading One

Why is the term "color blindness" usually a misleading one?

A) Most individuals are not actually totally "blind" to color,they see things in lighter shades of the actual color.
B) Most individuals are not actually totally "blind" to color,they see things in shades of white,gray,and black.
C) Most individuals are not actually "blind" to color,they see two primary colors but are insensitive to the third.
D) Most individuals are not actually "blind" to color,although they have no functioning cones,the rods allow them to see contrasting colors.