I haven’t run into a problem so far. Here is one of my darker colored coins: RIC Vol. I, NERO, As, Lugdunum, No. 543 (AD 66) Obverse: Nero, bare headed facing right Inscription clockwise from bottom: IMP NERO CAESAR AVG P MAX TRP P P Reverse: Winged Victory, walking left, holding shield inscribed SPQR Inscription: S -------- C (left and right)
You are right, it doesn't get lost in the dark background. When there is absolutely no background, just the coin, I think it also looks awesome, as if it is floating, like this one with no background, which I posted in another thread: