User Guide > Rendering and Render Setup > Shading > Shading Nodes > Maya Render Nodes > Color Utilities >
Rgb to Hsv
Converts an RGB (Red-Green-Blue) color into an HSV (Hue-Saturation-Value) color.
Some effects are easier to calculate using HSV values instead of RGB values. You can convert the output of any shading network into HSV values.
Find this utility in the Create Bar (see Hide, resize or customize the Create bar).
To use this utility, see Use the Rgb to Hsv utility.