A friend spilled some bleach in her livingroom. She hired a carpet company to come out and fix it. They cut some carpet from the back of a closet and patched it in. You have to look for it to see where it was done.

Analytical.... I sympathize. I woke up at 6am and found dog pee on my new carpet. I blotted it up and grabbed the bottle of Nature's Miracle and liberally soaked the area (directions on the bottle) - WELL, i am smelling bleach and realize I grabbed the wrong bottle and poured bleach on my new carpet..... it is right in a doorway and my sage color carpet is a peach color, fortunately it sort of looks like the light coming from the windows make the carpet look lighter in that spot. I can't offer any help except to say that your not alone... Now I use hydrogen peroxide for such "accidents" -- it is a lot cheaper too.....