theme-settings.php

<?php
/**
 * @file
 * Theme settings file for Basis.
 *
 * Although Basis itself does not provide any settings, we use this file to
 * inform the user that the module supports color schemes if the Color module
 * is enabled.
 *
 * @var array $form
 *   Modifications to this variable affect the contents of the theme form.
 */

if (module_exists('color')) {
  $form['header'] = array(
    '#type' => 'fieldset',
    '#title' => t('Header Settings'),
    '#collapsible' => TRUE,
  );
  $fields = array(
    'header',
    'base',
    'slogan',
    'titleslogan',
    'hovermenu',
    'menutoggle',
  );
  foreach ($fields as $field) {
    $form['header'][$field] = color_get_color_element($form['theme']['#value'], $field, $form);
  }

  $form['general'] = array(
    '#type' => 'fieldset',
    '#title' => t('General Settings'),
    '#collapsible' => TRUE,
  );
  $fields = array(
    'bg',
    'text',
    'link',
    'borders',
    'formfocusborder',
  );
  foreach ($fields as $field) {
    $form['general'][$field] = color_get_color_element($form['theme']['#value'], $field, $form);
  }

  $form['primary_tabs'] = array(
    '#type' => 'fieldset',
    '#title' => t('Tabs and Breadcrumb'),
    '#collapsible' => TRUE,
  );
  $fields = array(
    'primarytabs',
    'primarytabstext',
    'buttons',
  );
  foreach ($fields as $field) {
    $form['primary_tabs'][$field] = color_get_color_element($form['theme']['#value'], $field, $form);
  }

  $form['footer'] = array(
    '#type' => 'fieldset',
    '#title' => t('Footer Settings'),
    '#collapsible' => TRUE,
  );
  $fields = array(
    'footerborder',
    'footer',
    'footertext',
  );
  foreach ($fields as $field) {
    $form['footer'][$field] = color_get_color_element($form['theme']['#value'], $field, $form);
  }
}