Once you are done creating a color strategy in Color Pilot on Indigo, you can then point to an ICC file as your target. So for Offset you could use GRACoL or if you have a custom ICC from your offset press could use that. Only thing is after adding the ICC file you need to reprint and read in spot color charts. This is how we went about matching our Flexo Presses. (It was a very good match! We printed a fingerprint file on Indigo and compared it to the original fingerprint file we printed in Flexo)