Colour matching is a very difficult task…
In lithographic printing, electronic calibrators and print quality control can ensure a steady colour output in a single project. Colour match digital proofs use the same calibration standards used lithographic presses and can therefore deliver very good results. However, these proofs are expensive.
In digital printing, colour matching is a lot more difficult due to the individual technical specifications and calibration settings of each machine. Digital printing, however, allows the supplier to produce a single unit of the publication for proofing, hence allowing for colour adjustments in the artwork prior to production.
The key for colour matching and satisfactory printing production is good dialogue between designer, printer and client and most importantly a budget that will allow for digital colour proofing and testing.