This livery is a low visibility skin for the Royal Navy Harrier II, one with bomb sortie marking and Skeletor nose art and a clean skin with no sorties or nose art.
I recently created a bunch of navy liveries since I just released a campaign using the free Marianas map, you can download it for free here, why isn't it here on DCS user files? It allows for 30 flyable aircraft and that doesn't fit the uploader here, so now it's on Patreon instead: https://www.patreon.com/posts/dcs-free-133956150
