I live in Washington, DC. My twin sister, Heather, lives in Boise, Idaho. Totally independently, and without any input from the other, we each painted accent walls in our homes. I brought some giant paint chips with me when I visited Heather last weekend to give her a sense of what I'd done. Strangely enough, it was kind of old news...
Heather: Brown; Me: Woodpecker
Heather: Blue; Me: Carbon Dust
(I guess it's not totally surprising: I did pick out curtains for Heather's living room last Christmas, having seen her color scheme only once, more than a year earlier -- and they were pretty spot on, if I do say so myself.)