>>"Forward" is device to PCS. You should try: >>xicclu -fb -ip Fogra27L.icm < inputcolor-LAB.txt > outputcolor-CMYK.txt Thank you, it works. xicclu -fb -ip -s 100 /usr/share/color/icc/Fogra27L.icm xicclu -fb -ip -s 255 /usr/share/color/icc/sRGB.icc