A method of adapting color values, which have been produced for a first printing process to a second printing process, is performed so that the visual impressions of the colors in the two printing processes are identical. Starting from a first printing process adaptation U without maintaining the black build-up, which transforms the color values [C1,M1,Y1,K1] of the first printing process into color values [C2,M2,Y2,K2]U of the second printing process, and a second printing process adaptation V while maintaining the black build-up, which transforms the color values [C1,M1,Y1,K1] of the first printing process into color values [C2,M2,Y2,K2]V of the second printing process, a new printing process adaptation W is determined by weighted averaging of the transformed color values [C2,M2,Y2,K2]U and [C2,M2,Y2,K2]V.