About a year ago I was sent a pair of new old stock CB400F gauges to replace the faces because their colours were different. The owner had purchased the pair some years previously and they were still in the original boxes. The reason for the colour difference I believe was because they were printed at different times during the production process. I've never had anyone question the face colour and what they see is a clean face under a clean glass.
Anyone who has ordered parts from Lecam might know that mail from the Netherlands takes about three weeks according to the post mark on the envelope.