The Noise (Fractal) procedural texture also allows you to simulate ripples and bumps in your material.
Colors 1 and 2
The noise procedural has light and dark colors that you can modify using these two settings.
This controls the scale of the fractal noise.
This adds more detail to the fractal noise.
This controls the color balance. Low values accentuate color 2, and high values accentuate color 1.