If a person is born blind what do you think they may see in their dreams?

Maybe something similar to what a deaf person hears... i wonder if the have their own voice in their head, like when you read a book and say the words in your head? If they can... I'm not sure. Marked this as interesting, i really do wonder!!! Might it be like White noise? Or just vivid sounds with a black background? Or fuzziness... Perhaps some sort of nerve-electrical light show? Hmmmm....