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In commercial printing they had systems like Pantone, where you didnt worry about colors on screen , but you specified the Pantone number for the commercial printer to use. Probably obsolete these days

[god I am old ]

:)

Pantone is alive and well and still very much in use. en.wikipedia.org/wiki/Pantone

Airport security is a burden we must all shoulder. Do your part, and please grope yourself in advance.