On 22 Apr 2014, at 13:38, Ernst Dinkla <E.Dinkla@xxxxxxxxxxxxxxxxxx> wrote: > Is there an easy way to do that? Do you mean something like this: icclu -ff -ia rgbprofile.icc <<< '0 0 0' or icclu -ff -ia cmykprofile.icc <<< '1 1 1 1' If you just want the L value you could use awk: icclu -ff -ia rgbprofile.icc <<< '0 0 0' | awk '{print $8}' CMYK L value would be $9. -- Martin Idea Digital Imaging Ltd