1. A system for producing pure gray tones on a multicolor document output device comprising: means adapted for receiving device independent color data having at least three color components, corresponding to an associated electronic document; means adapted for receiving tolerance data representative of a selected range of the color data corresponding to gray coloration; means adapted for receiving chromaticity data; and gray conversion means adapted for generating single color grayscale data from the color data within the selected range in accordance with received chromaticity data.