For a description of the Reverse utility, see Reverse.
In the following, the color of a Marble texture is reversed. This means that 0.9 is subtracted from 1, making the color value 0.1. The result can be expressed as in the following formula:
Output = 1 - Input
You can enter values for Input to get the effect you want in the Attribute Editor. Reverse outputs and accepts single-component values, two-component values, and all three-component values.