Yes, Noises have colors.
White noise like White light is the mother noise that contains all the frequency. White noise is broken down into individual noise of smaller frequency like Brown, violet blue, pink noise.
The sound of a forest in an overcast weather is different from that of early morning on the sea beach. The later is soothing.
Utility:
Brown noise which is a distraction for normal person helps ADHD children to focus.
All ADHDs need a background noise disturbance to concentrate on a theme.
Dr Ramakanta's Ideas 