The color picker widget is implemented based this jQuery plugin: https://github.com/laktek/really-simple-color-picker
Demo: http://www.laktek.com/2008/10/27/really-simple-color-picker-in-jquery
This widget is more useful as a textfield (the default mode)
...
$this->widget('ext.colorpicker.ColorPicker', array(
'model' => $model,
'attribute' => 'color',
'options' => array( // Optional
'pickerDefault' => "ccc", // Configuration Object for JS
),
));
...
$this->widget('ext.colorpicker.ColorPicker', array(
'name' => 'color',
));
...