This is an old hobby horse of mine, but it is all very hit and miss if the monitor/camera/scanner/printer are not calibrated. Somewhere you need a benchmark, so that the colour you see is accurately represented across all the component parts, because otherwise, you end up like the guy with two wristwatches, that doesn't know the time.
Monitor is probably the best starting place, but you can also calibrate scanners, printers or anything that has to deal with light and colour. It is a Pain in the Bum, but once done, you will be able to see the difference. For my own Epson 3170, I use Silverfast software, which is superb. There are some good calibration options in there, though some are additional cost.
I had a large XP crash before Christmas and lost all of the calibration. I dread having to do it again, but it has to be done. When I get around to it, I might have to start posting on the Agony Aunt and Medical forums.
Conan