[jquery] jQuery UI Color Picker

I have heard that jQuery UI includes a Color Picker but could find little documentation regarding it.

Does it exist?

Any decent documentation on how to implement it?

I found this: http://docs.jquery.com/UI/Colorpicker

But using:

$("#colorpicker").colorpicker();

does not work, with Firebug telling me .colorpicker(); is not a method!

It seems to work fine, unless I put it in a dialog UI where it then decides to break.