On Tue, Jan 12, 2010 at 12:25 PM, Pascal de Bruijn <pmjdebruijn@xxxxxxxxx> wrote: > But, I still like to know how the RGB values are approximated... > > Say for example I'd like to include some self measured skin tones to a > generic chart? > > Regards, > Pascal de Bruijn > > If you have the RGB values from a digital photo, I think you can just run the RGB values thru the preliminary printer profile this way: xicclu –s 255 –ff –pl –ia Enter rgb values If you have lab values measured on your girlfriend with the colormunki :-) , you have to go the other way. There is an old thread about a related topic here: //www.freelists.org/post/argyllcms/how-to-add-patch-around-bw-axis