Popcolor class derives from Area class and creates a widget which allows the user to pick a color. Popcolor widgets usually contain a button which, when clicked, pops up a dialog prompting the user to choose a color. This is all managed automatically by the widget and you don't have to do anything except putting the widget somewhere in your window layout.
You can set the title of the popup dialog using the Popcolor.Title attribute on the Popcolor object. To get or set the current color of a Popcolor object, you can use the Popcolor.RGB attribute.