Method of, in a color mapper, mapping source colors of an image from a source color gamut of a source color device into the target color gamut of a target color device thus resulting in target colors, wherein the source color device is modeled by a source forward transform defined to transform color coordinates representing any color in a source device-dependent color space into color coordinates representing approximately the same color in a device-independent color space, wherein said source forward transform is further defined to operate on colors that are located outside said source color gamut, wherein said target color device is modeled by a target inverse transform defined to transform color coordinates representing any color in said device-independent color space into color coordinates representing approximately the same color in a target device-dependent color space, said method comprising the steps of: - applying an inverse of said target inverse transform and then an inverse of said source forward transform to a gamut boundary description of said target color gamut operative in said target device-dependent color space in order to obtain a gamut boundary description of a transformed target color gamut operative in said source device-dependent color space, and, for each source color of said source colors represented by color coordinates RGB in said source device-dependent color space: - in said source device-dependent color space, mapping said source color from said source color gamut into said transformed target color gamut, resulting in a target color represented by color coordinates R"'G"'B"' in said source device-dependent color space, and - applying said source forward transform to convert the color coordinates R"'G"'B"' representing said target color in said source device-dependent color space into color coordinates representing said target color in said device-independent color space, and then, applying said target inverse transform to convert color coordinates representing said target color in said device-independent color space into color coordinates R'G'B' representing said target color in said target device-dependent color space. - applying an inverse of said target inverse transform and then an inverse of said source forward transform to a gamut boundary description of said target color gamut operative in said target device-dependent color space in order to obtain a gamut boundary description of a transformed target color gamut operative in said source device-dependent color space, and, for each source color of said source colors represented by color coordinates RGB in said source device-dependent color space: - in said source device-dependent color space, mapping said source color from said source color gamut into said transformed target color gamut, resulting in a target color represented by color coordinates R"'G"'B"' in said source device-dependent color space, and - applying said source forward transform to convert the color coordinates R"'G"'B"' representing said target color in said source device-dependent color space into color coordinates representing said target color in said device-independent color space, and then, applying said target inverse transform to convert color coordinates representing said target color in said device-independent color space into color coordinates R'G'B' representing said target color in said target device-dependent color space.