Midnight black does imply 'pitch black'. But whether that can be achieved as the game has progressed is open to debate. Perhaps the paintjob would better be marketed as Deep Grey? If kept as Midnight Black it may not meet the expectations of the purchaser.
In the UK, describing products with accuracy is a tricky thing. Get it wrong and it may then be considered misleading or even (perhaps to some extent here) 'not fit for purpose'.
One way around this would be if FDev was to offer a 10 minute 'refund window' for paint jobs, so the purchaser could either accept what they have received or challenge the accuracy of the product description.
Most players would perhaps be satisfied with the purchase but others may hold a different view, so perhaps this is an area in which Frontier could improve.
Most likely I'll buy the Midnight Black paint job for my Corvette. Then if I do like it and feel satisfied, I may apply it to my entire fleet.
If it does look quite grey though, I think it would still look good on the Corvette.
Could an incorrect gamma setting be responsible for making the colour look more grey than it is? Some players do prefer settings that enable them to see into the darkness more; when mining for instance.
I must admit, some of the paint jobs I've bought in the past look great in the Store but are not what I expected after having been purchased and applied to the ship.
So, a question to FDev moving forwards... Would you consider offering players a 10 minute window of refund opportunity on the sale of each of your paint jobs?