I watched several videos of a YouTuber named Garand Thumb who is apparently an air force survival or SERE specialist. For whatever reason he keeps that secretive on his YouTube channel but talks openly about it on his Sofrep/Loadout articles. He's been wearing a Multicam in a lot of videos that somehow seems darker than most. Sometimes I believe it's our old friend, woodland, until I look more closely.
It could be a set thats never seen life outside of his studio and has never faded as a result. I have a new massif top that's considerably darker than my pants for that very reason