No colors anymore, I want them to turn black

GAH. When I put the rug down in the upstairs bedroom, I had to move the bed. To move the bed, I had to tip it up and, due to some misjudgement, I scraped the slanted ceiling and scuffed off some of the paint. No problem, I thought, I'll just touch it up with the paint the former owners left downstairs...

Except the house is varying shades of tan and none of the cans are marked with which room they coincide.

I started out with too-dark and sightly orangey. Now I'm too light and slightly yellowy. I am starting to actively resent the former owners for not labeling their paint and do solemnly swear that if/when I sell this place, I will mark all paint remnants so I don't eff the new people up, should they choose to keep my colors. Which will also not be varying shades of tan.