Computer monitors generate color with three light guns: red, green and blue. Computer printers generate color with four ink jets: cyan, magenta, yellow and black. They speak two different color languages and getting one to translate perfectly to the other can be impossible.
The closest you'll be able to get to "matching" the color on your monitor to what comes out of your printer will be by going through a process of calibrating your monitor, being sure the monitor and the software and the printer are all working in the same "color space", RGB, CMYK, CIE, LAB, or any of a bunch of other color descriptions, etc.
And even then, the printed output won't look the same because the monitor is an actual source of light and the printer ink is just reflected light coming off a piece of paper.
I spent years working on color balancing and color correction, with various hardware and software and finally gave up ever getting anything you could call an exact match, to be quite frank!
Many artists do paint directly from their monitor to avoid this whole issue entirely.
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