Color/Shift Hue
 
 

The wavelength of light is perceived as Hue by the human eye. It let's you distinguish between red, yellow, green, cyan, blue, purple and their various shades.

The Shift Hue function changes the wavelength of all the texture's colors. If a color leaves the visible spectrum, it's wrapped to the other side of the visible range.

 

Meaningful values of the Bias parameter are located between -100 and 100. It defines how far (in percent) the colors get shifted along the hue map.