Two-tone paint schemes: why?

We've had to touch up the paint around the house in preparation for moving out and selling the place, and I have to say, two-tone paint schemes may be pretty, but touching them up a few years later is a big pain. Especially when you can't purchase those particular paints in the smallest can size. And the colors are very similar, but not quite the same, so it's a big pain if you get a spot wrong.

Well, anyway... I'm sorta glad that the walls aren't white, but the two-tone thing is pretty annoying about now. At least they left the paint chips.

Update 3/27/08: alright, a heck of a lot of people are finding this page because they actually wanted to know about two-tone paint schemes. What can I say? Well... if you own your own place, and you are thinking about doing a two-tone paint scheme:

Please pick paints that're easy to purchase more of later.
Please keep the paint chips. Even if you are repainting later, it'll be a lot easier.
If you do leave the place, any amount of explanation you can offer the next owners will be a major boon.
If you really want to be nice, leave a little bit of the actual paint there. We bought some small canisters of the stuff, both colors, and left it there for the new owners.

Also:

When you're testing, try painting two boards, one of each color, then you can hold them up and see what it looks like.
You'll find this out for yourself, but mostly you're going to find random articles about this on the web and not a whole lot of helpful articles. However, there are definitely some random tips.
There is a lot more information on the web about car colors than house colors.

If you came here looking for useful tips and all you got was my useless drivel, sorry to hear that. Good luck!

House