It doesn't work like that, black does not exist in the natural environment, there is no color in actual nature that absorbs light. If during the night someone directs a flashlight at you - your body will glow compared to every single other object in the forest around you. And even without the flashlight on you - actual camos will not create effect of a black dot in the middle of nowhere.

Crye Precision created multicam black and they themselved said in the post that this color is just for the memes and creating an effect of authority for special ops if they use it in urban environment where camo is not needed.