The difference is the spectral power distribution of the noise. White noise has a flat spectrum from low to high frequencies. It has the standard noise sound t

The difference is the spectral power distribution of the noise. White noise has a flat spectrum from low to high frequencies. It has the standard noise sound that most of us recognize from digital systems. Pink noise is shaped with a decreasing power as frequency increases. This results in more low frequency noise and less high frequency noise. This noise pattern occurs frequently in natural systems. Different colors of noise have different sounds to our ears, of course. The color naming scheme is loosely intended to map to light spectral distributions. For example, blue noise has a rising power with increasing frequency, similar to how blue light has more energy at higher frequencies (shorter wavelengths).