The company I work for make LED lighting and controls. Part of my problem as the software engineer is getting people to understand that the colour they see on their screen (whether it be LCD or CRT or even printed out PANTONE or RAL colour swabs) will be different from the colour mix they get from the RGB(W) LED blending system we use.
I've noticed that there is a perceivable difference from one person to the next when it comes to determining colours. We always have a disclaimer on our products to the effect that users need to understand these differences and to test the colours on-site to ensure the customer gets exactly what they asked for.
With digital photgraphy there are three electronic steps before a physical photo is produced: CCD -> PC -> Printer. To get the best results all steps should be calibrated to some standard, either PANTONE or HKS I guess.
</ end of unqualified rant
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