In the 1950s,most dream scholars thought that dreams were mostly black and white.However,this was found to be untrue.Color imagery is common in dreams as they are mostly visual things,with visual neurons continuously moving during REM sleep.Colors mean different things to different people; however,there are general emotions that can be associated with each dominant color,such as anger for red and hopefulness for green. 4.People People who are important in our lives during the time of the dream often show up in our sleeping images.Sigmund Freud believed that these were leftovers from interactions or other social stimulation that went on throughout the day. These individuals also represent either a good or bad time in someone's life and carry that feeling into the dream due to association. From eHow.comIn the 1950s, most dream scholars thought that dreams were mostly black and white. However, this was found to be untrue. Color imagery is common in dreams as they are mostly visual things, with visual neurons continuously moving during REM sleep. Colors mean different things to different people; however, there are general emotions that can be associated with each dominant color, such as anger for red and hopefulness for green. 4. People People who are important in our lives during the time of the dream often show up in our sleeping images. Sigmund Freud believed that these were leftovers from interactions or other social stimulation that went on throughout the day. These individuals also represent either a good or bad time in someone's life and carry that feeling into the dream due to association. From eHow.com