The Nightborn Peloran were designed with chameleon-like skin that defaulted to a coal-black color at most times. They fully or partially absorb nearly all wavelengths of the visible spectrum and beyond, and can convert that energy into changing the actual wavelengths they radiate back out. Their color. Their heat. Everything they radiate through the skin or hair is adjustable through a simple matter of will and visualization exercises. This was designed to allow them to blend into the environment they would be fighting from. But when they proved to be poor soldiers, it became the camouflage they wore to look like the people whose groups they were infiltrating. This, along with their quick and ready willingness to learn things and adjust their ways of acting to conform with other groups, makes them human intelligence agents without peer in all of human space. And the literal fleet of small stealth scout ships they deploy throughout human space allows them to go anywhere they need to learn things.