to get your own interpretaton of this next time you go out walk a few hundred yards from your spread and see what stands out best for you. you wil notice immediately what stands out most for me in my area where i hunt mostly my blackducks stood out from the furthest away.
i worked as a commercial gillnetter for a few years, on our highflyers we would have a big white bag and a black bag tied to the pole depending on the conditions you either saw the white or the black first most of the time you could spot the black from the furthest away