Kuler - Discovering and sharing colors

Good for those who could not long ago the people of Adobe think Kuler , a Web site dedicated to distributing collections of colors created by them in addition to those sent by users of the site.
For those who wonder what use this site or use it ... it can be very useful and interesting, for example when there is not very clear what colors to use in a design, check what color it feels good to another, as see the contrast and more.