int ps_makespotcolor ( resource psdoc, string name [, float reserved] )
Creates a spot color from the current fill color. The fill color must be
defined in rgb, cmyk or gray colorspace. The spot color name can be an
arbitrary name. A spot color can be set as any color with
ps_setcolor().
Возвращаемые значения
The id of the new spot color or 0 in case of an error.