1. In a color management system having a user-selectable gamut mapping model, a method for transforming a source device colorant value in a source device colorant space to a corresponding destination device colorant value in a destination device colorant space, wherein the source and destination device colorant values each have non-black colorant values and a black colorant value, and wherein the source and destination device colorant spaces are colorimetrically characterized by source and destination device models, the method comprising: determining whether all of the non-black colorant values of the source device colorant value are zero; transforming the source device colorant value to a colorimetric value using the source device model; transforming the colorimetric value to a gamut-mapped colorimetric value using the user-selectable gamut-mapping model; and selecting a destination device colorant value based on the determination in the determining step, wherein in a case where all of the non-black colorant values of the source device colorant value are zero, the destination device colorant value is selected so that the black colorant value of the destination device colorant value reproduces a lightness of the gamut-mapped colorimetric value, and all of the non-black colorant values of the destination device colorant value are zero, and wherein in a case where not all of the non-black colorant values of the source device colorant value are zero, the destination device colorant value is selected so that a combination of the non-black and black colorant values of the destination device colorant value reproduces the gamut-mapped colorimetric value.