From Xojo Documentation
Returns a Color based on the CMY (cyan, magenta, yellow) color model.
result=CMY(cyan, magenta, yellow)
|result||Color||An object that represents the color based on the cyan, magenta, and yellow values.|
|cyan||Double||The value of Cyan in the color (0-1).|
|magenta||Double||The value of Magenta in the color (0-1).|
|yellow||Double||The value of Yellow in the color (0-1).|
The CMY function returns a Color based on the amounts of Cyan, Magenta, and Yellow passed. These amounts are represented by doubles between 0 and 1 and are stored internally as three bytes. You can also use either the RGB or HSV models to assign a color. You can specify a color literal with the &c literal.