Grayscale default output color profile. Specifies the name of the ICC color profile to be used for grayscale response images when no output color space is specified with icc= and for certain grayscale color values specified with various Image Serving commands, such as color=.
Text string. If specified, must be a valid icc::Name value from the ICC profile map of either this image catalog or the default catalog, or a file path relative to attribute::RootPath. The referenced ICC profile must be a grayscale profile.
Inherited from default::IccProfileGray if not defined or if empty.