What is the correct color adjustment?
You may want to have a look at the ACR calibration script:
Thank you for the link. I hope that it is the answer. I always used only gray card, however the the saturation or vibrance adjustments do not effect the Gray level.
Adjusting them by memory to be correct is impossible. I even started checking imaging-resource.com for a camera with minimal color error (Imatest Results). The winner was Nikon D5000 (color error - hue and saturation) and price!!!. However, I would have to spend over $1,000 for a better camera but with the same problem at the end.
Thank you again.