The electromagnetic adaptive camouflage system
The biggest reason that Amerikka Command survives to plague the Atlantic Federation, the only reason the ACPS hasn't destroyed the Python Pirate Syndicate, is their mastery and sharing of shroud technology.
These humanoids have flesh that resembles a peeled orange or other citrus fruit: semi-translucent with prominent veins. Brightly colored, some Rutaceaens are orange, some are yellow, and some green. They prefer warm climates with lots of rainfall.