In a discussion with my son about absolute zero, we arrived at the conclusion that the event horizon might be the place to look, as it "absorbs?" all energy, including light.
Found this in the community which supports the idea that it's pretty cold to the touch: Lowest temperature possible in the universe?
Don't know enough about blackbody radiation to say, but my understanding of black holes is that anything they can't eat gets stretched, shredded, spun and ejected in jets from the poles, which leads me back to:
If we could get close enough to the event horizon to get a measure free from the influence of the "inedible" stuff's temperature, which I would think would have to be pretty close, just how cold would the "outside" of the event horizon, at the point where it's "absorbing" all matter and energy, including light, be?
Things would be moving, which contradicts absolute zero rules, but if all energy is being absorbed at the EH, we must be pretty close.
Current theory suggests that the "inside surface" of the EH should be violently hot, but the temperature of the "outside surface" would almost certainly have to be very cold, wouldn't it?