Re: Trying to match wall paint
You're better off repainting the entire wall/room. As was stated, the paint will be dirty and faded, so even if you had some remnants to use, the touch ups would stand out like a sore thumb. Even if you were to get a good match to the dirty faded wall, your touch ups will stick out like a sore thumb. You will need to repaint the entire wall to blend the new paint to the old. As long as you stop in a corner it should be fairly unnoticeable.
This is also why you should always keep a record of your paint brand, base tint, and color mix code so that when the need arises you can get more of the same.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!