I've used Black many years in the past-no problem. Shine or glare is the give away. Also, as far as a blind goes, IF it's dark inside either works.
If you limbs are shiny black just put a strip of camo tape on it. doesn't hurt the finish or performance of your bow.
blind-Have a buddy get inside your blind in front of a window & zoom in with a video camera from say 15 yds. if it's dark you won't see him until your Zoomed in real close...My brother & I did this experiment to find out.