Colour Management
Colour management is a very wide and complex subject, to gain full control of an image from camera/scanner to final print will take quite a few careful steps, all of which should be controlled, monitored and repeatable.
Many users have different levels of expectation from their systems, therefore, I reccommend that you read at least one of the excellent books available. Most of these are published by very clever colour experts. You can then decide how much time and money you need to invest in achieving your colour management goals.
Colour management doesn’t need to be expensive, but it does need to be done right.