I think it might relate to some "mass follower" script

See this forum thread: http://psx-scene.com/forums/f195/twitter-1200-follwer-hack-v... which links to this pastebin page which contains a bunch of users all with that password http://pastebin.com/0hcDigvU

It's a rather pleasant shade of blue, and a Syracuse, NY telephone exchange. Other than that, no significance I can gather. May well be an arbitrarily chosen random number.

http://www.colorhexa.com/315475 http://xkcd.com/221/

All of these accounts were not email address usernames - ie had no @xxxx

So maybe random generated by twitter or spam accounts?

Edit: Appear to be closed or suspended accounts.