thanks for the very interesting question
I have looked up various articles and I have somehow concluded that they dream and in three dimensions as the rest of sense is more stronger than us ( when person become blind the other sense will become more stronger) so they can draw pictures in three dimension in dreams so, blind people tend to “see” in their dreams, even though those who were blind at birth only have mixed noises as dreams. Those who are blind at birth don’t see “colored dreams”. For those who lost their eyesight for some reason, they too, have dreams. They are, in a way, lucky to have “colored dreams”. It is because they had the chance too see in color, unlike the ones who weren’t able to see at birth.
thanks again for this questions