From the Telegraph:
New research suggests that the type of television you watched as a child has a profound
effect on the colour of your dreams. While almost all under 25s dream in colour, thousands of over 55s, all of whom were brought up with black and white sets, often dream in monchrome – even now.The findings suggest that the moment when Dorothy passes out of monochrome Kansas and awakes in Technicolor Oz may have had more significance for our subconscious than we literally ever dreamed of.