1. A system for producing pure gray portions on a color image rendered on a multicolor document output device comprising: means adapted for storing image data inclusive of device independent color data having at least three color components, corresponding to an associated electronic document; means adapted for storing tolerance data representative of a selected range of the color data associated with at least one of the color components corresponding to gray coloration; means adapted for receiving chromaticity data; a processor and associated memory including gray conversion means adapted for generating single color grayscale data from the color data within the selected range in accordance with received chromaticity data wherein color data is outside of the selected range; and means adapted for generating an output image having both a grayscale portion and a color portion in accordance with the grayscale data and the color data outside of the selected range.