1. A system operable to convert input data of a print job to a cyan, magenta, yellow, and black (CMYK) color space of a printer, the system comprising: a detector operable to detect a color space of the input data; and a processor operable to process a lookup table of color values for the color space of the input data based on the detected color space of the input data to identify gray color values in the lookup table, to determine that the identified gray color values of the lookup table produce an output in the CMYK color space of the printer that includes one or more of cyan, magenta, and yellow color components, to replace the identified gray color values of the lookup table that produce said output with black color values, and to correspond the black color values of the lookup table with gray color values of the input data to convert the corresponding gray color values of the input data to the CMYK color space of the printer.