A data structure comprising a user-maintained list of colors is scanned to determine if a particular color within the user-maintained list of colors has been re-defined. If the particular has been redefined within the user-maintained list of colors, the particular color is searched for and identified in an alternative data structure comprising a user-specified extensible set of alternative colors. The particular color identified in the alternative data structure can then be automatically parsed in order to extract color space and value information associated with the particular color and define image-processing operations involving the particular color. The color space associated with the particular color in the alternative data structure can then be translated to a known color space in order to provide the correct color in the printed output.