Print colour is always inferior to the RGB colour on a good screen. The best we can do is to get as close as possible.
Draw it, export it into CMYK profile and take a sample print. I do not know any other method which can accurately tell us about the difference from the screen RGB colours.
Draw it, export it into CMYK profile and take a sample print. I do not know any other method which can accurately tell us about the difference from the screen RGB colours.