Blind dreams?

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If you were born blind do you dream in color/images? I feel that you do not because you never had recollection of what those are without images being observed by your eyes and interpreted through your brain. My friends and I discuss this a lot and one always says that they may have come sense of images because of the fact that they can touch smell hear and taste, and he told me they could probably dream of the bumps and curves they feel. I was just wondering what you guys thought, also if any of you know of a blind person you may ask them this, if they can actually interpret what an image is.