It is impossible to describe any colors to a born-blind man. Since, seeing is a very special sense of five senses which allows one to have a direct experience or perception of the colors of things. Being born as a blind man means being cut off with the colors of the natural world. Even though, some one might try to describe a color to a blind man by associating with some thing else such as, red is associated with hot...This way is nothing esle but a way of using a feeling of hot that might lead to a conceptual or imagining experience of the color, not a real experience by acquaintance. Hot is hot. It can not be used to substitute for red. Red is not hot. One sees color, not see hot.
