Most persons state that most of their dreams are without color, or relate them as black and white. These are cases where color was simply not a part of the dream experience. The recall of black, white or gray images in dreams actually does have color significance.
Color is as much a symbol as is the imagery in a dream.
Color appears to represent the emotional conditions that stimulated a dream segment or a particular image. A red hat would be more expressive of vibrancy, for example, than a colorless hat. We will see that the color our mind assigns to images in dreams is as meaningful as the image itself. The color of an image in a dream can be simply derived from past associations, something you saw in waking life that the dream is recalling. For the most part, however, the color comes from an association with the effect it has on your nervous system and your emotions.