There are a few colorful noises in audio. Pink noise. White noise. What does it all mean? When I have a question, I consult wikipedia.org. Their description of pink noise is:

1/Æ’ noise is used… to refer to any noise with a power spectral density of the form

where Æ’ is frequency and 0 < α < 2, with α usually close to 1. These “1/Æ’-like” noises occur widely in nature and are a source of considerable interest in many fields.

There. Does that clear it all up?