On May 8, 2013, at 5:49 AM, pierre bertin <pierrebert77@xxxxxxxx> wrote: > I tried spotread command that returns me the following values: > Result is XYZ: 83.179231 87.947000 47.611529, D50 Lab: 95.138620 -3.068816 > 25.098105 > but I do not know if this is the right command. Yes, spotread is the right command...but that's *very* yellow for a paper. It's the sort of thing I'd expect from aged newsprint. If that doesn't describe what you sampled, something else is amiss. > another question: There is there a way to retrieve values XYZ or LAB in > gimp or scribus? I don't think Gimp supports anything other than eight-bit RGB values. Sadly, there is only one good tool for manipulating other than eight-bit RGB files -- Photoshop -- and soon, if you don't already own a copy, your only choice will be to rent it. But if you're just wanting to look up RGB values for a Lab or XYZ color in a particular color space, that's what Argyll's xicclu is for. Cheers, b&