Methods and devices automatically determine a base color gamut of base marking materials and extension color gamuts of extension marking materials. As each print job is received, these methods and devices automatically evaluate the print job to determine the print job color gamut. Then, the methods and devices can automatically determine the closest match between: the print job color gamut; and the base color gamut or one of the extension color gamuts to identify a matching color gamut. Further, these methods and devices automatically output the matching color gamut (and potentially a corresponding interchangeable supply container, if the matching color gamut is one of the extension color gamuts) by, for example, displaying the matching color gamut and the corresponding interchangeable supply container in at least one additional column in a print queue, or displaying the matching color gamut and the corresponding interchangeable supply container in a separate gamut queue.