I've long wondered about this, and a recent news item renewed my interest in exploring it further. A new type of eye-surgery (for a specific eye problem) involves the connection of a low-resolution light-sensitive array to the optical nerves... giving the patients a very limited type of vision; a long way from a cure, but better than full blindness. When being interviewed, one of the patients said that one of the effects of the treatment was that, for the first time in years, he was having dreams in colour.
Now, to me, the idea of coloured-dreams is a nonsensical one. I have dreams, sure, but they're not in colour. They're not even in monochrome. The eyes aren't used in dreams and (for me) actual images aren't involved. They are thought-processes, involving the concept of images... not actual images. I mean, they can be very real and I've often woken from a (bad) dream to find myself very thankful that it was just a dream. They feel very real, but they've never been images that could be described as "colour".
And I'm curious to know if my dreams are usual or unusual.
So, do you dream in colour?