There's not really an inside of a black hole anyway. The black hole it self is nothing but a tiny spot yet massive in weight. There's an inside the event horizon though. Commonly people like to refer to the size of the event horizon as the size of the black hole, so that might be the "inside". In that case it's hard to tell whether it's bright or not. My guess is that it's certainly brighter looking outside than towards the singularity, which should be black, because there's no light coming from that direction whatsoever, since it all gets swallowed. Then again I'm no physicist, so I'm not really qualified to make any claims here.

There are actually a several effects that can make a 'black' hole rather bright from sufficient distance. Hawking radiation, gravitational lensing, frame-dragging, and an accretion disk can create some ridiculousness energetic objects.

As pure black is the absence of light, nobody can claim to directly see pure black. The detection of pure black goes like this, 'Nothing to see here, moving along'.

Your comment reminded me of this video on black holes: https://www.youtube.com/watch?v=GYKyt3C0oT4