first thing that I thought to myself when I saw the name - half the world spells it different, so they may want to also buy and brand the colour.com domain
They actually own Colour.com as well! :)
i might see if I can get colorapp.com for £3.50
update: I can't, its taken. But I've been offered colour.com for £350k, I'm considering it.
Why don't you buy colorapp.com then Geoff
i don't really know anything about domain value but i'd honestly have guessed higher.