The rods and cones in our eyes make it possible for us to see the world; in combination with the bending of light, we see in color. Without light, if we could see-everything would be in black and white. During sleep-our eyes are closed, which means no light enters, which means we dream in black and white. It is our MEMORY that adds color to a dream. Most blind people do not dream, and if they do, it must be non-visual.
This is highly scientific, but this would mean that there is not a 'dream world'...

What do you guys think. Everyone has a different opinion, some think its a different plane, some think its just a 'dream'...

Cheers!