If I were looking at a black hole with an accretion disk, I presume it would appear something like this: 
I.e., the black hole is as black as black can be, and the disk on the far side of the hole is visible to us, unlike e.g. Saturn's rings.
What would a white hole look like? By white hole, I refer to a region of spacetime into which nothing may enter. If it were surrounded by a disk like the black hole above, what would that disk look like to us?
