They have been really difficult about it. Yet even after buffing it it still doesn’t even come close to the document that they used (I gave them it) to calculate it!!!
The chosen shade of dark green is probably too dark compared to the real NATO Green that was on the Harriers in the 90s. But otherwise it’s fine.
It’s not easy to find photos of Harriers in these colours that aren’t distorted by being on old film cameras and scanned though - so they do tend to look darker in most images, and I think the devs can be forgiven for painting them as such.
But if the devs want visual reference for the colours:
The same two green colours were used on RAF Puma HC.1, and Wessex HC.2s at that time, and examples persisted for a lot longer than on Harrier. So you can find more modern photos showing that scheme from air shows and museums etc. in the digital camera age
The Pumas went on to use the NATO green all over without the Lichen Green stripes (HC.2), and Chinook and Merlin in RAF service always used the single-colour all-over NATO green. So it’s not hard to see how the dark green should look. In general it’s basically the same colour as we use on tanks now.