Colorimetric characteristics of digital printing techniques established during a longer period of time are of significance in the establishment of the number of colors that it is possible to print using the CMYK printing system, and such defined values are today considered to be generally accepted printing standards. Through previous knowledge it has been established that problems in printing quality appear, which in the immediate application of digital printing appear in the border area of color reproduction, i.e. their colorimetric characteristics, especially in the color conversion from RGB to CMYK system. This paper will research the colorimetric characteristics of the border area of reproduction colors in digital printing techniques, where significant changes occur during color conversion, and by it also the decrease in printing quality in the way that, during printing, reproduction of less saturated colors than expected occurs. The research will also focus on the areas where changes are imperceptible even when changes can lead to the increase in printing quality in a way that the colors achieved on the imprint cannot be achieved in RGB colors. The analysis of the received results will allow a more complete understanding of the possibilities of the border areas of digital printing techniques considering the established colorimetric characteristics that will, in the end, result in the recommendations for the new standards of printing quality.