Reproduction of pleasing colors is one of the efficient methods to improve the perceived image quality of digital color imaging devices. Observer preference in the color reproduction of pictorial images has been a topic of research for many years. Preferred color reproduction, following certain rules upon the behavioral study of visual preference, is a deviation from colorimetric color reproduction, which aims at absolute color accuracy. Memory colors play an important role in the preferred color reproduction. This paper introduces methods to manipulate images in order to achieve preferred color reproduction. The methods are tested through psychophysical experiments. Conclusions are drawn and discussed in the paper.