Well, first I tried to solve my color issues with the Capture One color editor. Of course that would have been the easiest solution, but I came to the conclusion that a) the color editor relies only on visual response (you pick a color from your image and correct this color with a larger or smaller part of its environment until you like what you see on your display), b) working by numbers is nearly impossible (e.g. making the Color Checker 24 patches on a photo match their "should be numbers"), c) you can’t pick colors that are rather close to each other and correct them independently (e.g. Color Checker 24 patches). I felt that this just does not work for me. I also had a support case with Phase One about this issue, but after a while we came to the conclusion that only a custom ICC profile would do. Then I made some experiments with taking pictures of Color Checker 24 and IT8 charts and making profiles with the help of RPP, Raw Therapee and Argyll CMS. Long story short: I don’t have a well enough controlled environment to make decent shots of the targets and setting up the workflow computation-wise is a full time job and full of pitfalls. I have more or less given up on this for the moment, although through my experiments I could see that this path definitely leads in the right direction. The colors that were off before had greatly improved, but I could not get rid of banding areas and did not feel comfortable enough with the profiles to base my entire workflow on them. Now I am trying another thing: I copy the ICC profiles that Capture NX2 produces during development over to Capture One and work on that basis. I am not yet sure if this will do the job, but it sure looks better than before …