White, Pink, Red, Blue, violet and grey Noise

"white noise is a random signal (or process) with a flat power spectral density. The signal's power spectral density has equal power in any band, at any centre frequency, having a given bandwidth. White noise is considered analogous to white light which contains all frequencies".
(from wikipedia)

Noise, like painting, can be also defined by colours. Even the electronics components have colours. The electronic circuit becomes like multicolour city. The components are the buildings and the streets are the connection between the buildings. The noisy property of the sound is generated through this crowd and imaginary space, which is identified also by colours.