Earlier quoted context omitted.
Is there any area in particular that seems problematic?
For me it's board games, and more specifically expansions. The last expansion I bought had slightly differently colored card backs than the base game, meaning you could tell if someone had expansion cards and making the expansion unusable. I had to compare them both to a friend's sets to know which was counterfeit.
Manufacturers are not great at getting card color to match, even for the same item, even in the same manufacturing run. I've got three kickstarters that have outstanding shipments to send out replacement cards because colors were mismatched on the backs in the very same box, and more that have already done it.
I've only purchased Kingdom Death Monster expansions from the official store, and card colors are hit and miss.
QC on color accuracy is pretty shitty in the popular factories used to produce boardgames, unfortunately.