Looking into a mirror in the room (without actually being there), it would slowly fade into green, so the entire room would become a greenish tint. This is because most standard mirrors reflects some greens instead of absorbing them to make them part of the image.
You got your physics messed up there. Things don't absorb ligt for it to become part of the image. They reflect it. We see reflected light.
For example a Red Box reflects Red and absorbs Blue and Green. Mirrors reflect all colors, but reflect green slightly moreso.
In an art museum close by. There is said room. Its pitch black and the only light source is small dangling lights. (Like Christmas lights) it's amazing. It looks like your floating in space with millions and millions of little stars
it would look like an endless tunnel that disappears off behind you eventually (as in, your reflections would be stood in the way of seeing the end) Same with a camera.
since there is no apparent light source it would be completely dark. and if there was for example be a light bulb to give light, you would see a light bulb reflected for i'm guessing infinity. that or till the light won't be able to reach.
For example a Red Box reflects Red and absorbs Blue and Green. Mirrors reflect all colors, but reflect green slightly moreso.
It would be like this :)
http://edwardspoonhands.com/post/95668109540/pyrrhiccomedy-edens-blog