A lot of this comes from an era where printers were even more dogshit, so your colors can be quite a bit farther off than you might expect. I still see it some in board games, where the colors on the manual and board don't quite match up, sometimes enough to be kind of confusing.

But printers these days are aware that you're designing your stuff on a computer in RGB, and can make a pretty good guess as to what color you actually meant, so it's nowhere near as bad as it was in the 90s.