Oooo...colour matching...sometimes I think World Peace would be easier! :Big Laugh
Heck, it's a miracle we get as close as we do to matching.
Our clients scan stuff on RGB scanners and create artwork on RGB monitors selecting PMS colours, then we have to match their colours with 4 colour process printers (or 6 or 8 or more) - all of this on wildly differing media! Let alone the differing gamuts of aqueous, solvent, UV on various brands of equipment.
The above posters are right - find yourself a PMS & tint chart (use the search function on this forum) and print one out.
But you must be absolutely 100% consistent when applying these colours - changing colour spaces in your design application or RIP software will alter how these colours print out. So once you have your settings sorted, don't mess with them!
If you do decide to print out a chart, write on it all the settings you can - resolution, uni/bi-directional, ICC profiles on/off etc - so you have a chance of duplicating the results.
Take care if your clients want you to match colours precisely - their application settings need to be consistent. One of my clients is the State Art Gallery who we print colour matched panels for. We were getting mis-matching of colour even though our machine settings were the same all the time.
Turns out that they produced the artwork (InDesign) on three Macs that had their Preferences differing, plus their settings in Press Ready PDFs weren't the same either. They'd bought the third Mac after I'd sent them the settings for the first two, but forgot to tell me about the new Mac. So you can see you can't change a thing if matching is important.
Stuff like this is the reason why my liver is many years older than the rest of me...