Method for adapting a lab setpoint color value of multicolored printed products

A method of adapting a Lab setpoint color value of multicolored printed products where at least one special color is replaced with the use of an ICC color profile by a combination of at least two process colors participating in the replacement, the method comprising:

• metrologically acquiring by a color measuring system at least one measurement point on the printed product that is assigned to the replaced special color and ascertaining therefrom a Lab actual color value of the measurement point by a computer;
• using the ICC color profile or a matching standardized ICC color profile for a computer determination of a color composition of a Lab setpoint color value from the participating process colors;
• ascertaining layer thicknesses of the participating process colors to achieve a predetermined Lab setpoint color value of the measurement point using a digital tool or a digital model;
• and
• adapting at least the participating process colors using the ascertained changes of the layer thicknesses of the participating process colors.