While we were reading up on the science of dreams, we came across this amazing fact from howsleepworks.com...

"Most people dream in colour, but some people do dream in black and white. Interestingly, much fewer people report dreaming in black and white now than did 50 years ago (when television was black and white), and most of those that do still claim to dream in black and white are of an age to remember black and white television. This has led some to conclude that media exposure as a child influences, or perhaps in some way reconstructs, our dreams (or at least our memories of dreams). " 

Source: howsleepworks.com