EDIT

/**

 *

 * Enter description here ...

 * @param $color_settings_key

 *

 */

function zen_dataportal_form_widget_color(&$form, $color_settings_key, $description) {

  $label = str_replace('_', ' ', $color_settings_key);

  $form['zen_dataportal_colors'][$color_settings_key] = array(

          '#type'          => 'textfield',

          '#title'         => ucfirst(t($label)),

          '#default_value' => theme_get_setting($color_settings_key),

          '#description'   => $description, //t('Set the color of the site name which is shown in the header. Must be a css color value like: #000000'),

          '#attributes' => array(

            'class' => array('color-picker'),

            'size' => '7',

          ),

  );

}