Implements hook_form_FORM_ID_alter().
function color_form_system_theme_settings_alter(&$form, &$form_state) {
if (isset($form_state['build_info']['args'][0]) && ($theme = $form_state['build_info']['args'][0]) && color_get_info($theme) && function_exists('gd_info')) {
$form['color'] = array(
'#type' => 'details',
'#title' => t('Color scheme'),
'#weight' => -1,
'#attributes' => array(
'id' => 'color_scheme_form',
),
'#theme' => 'color_scheme_form',
);
$form['color'] += color_scheme_form($form, $form_state, $theme);
$form['#validate'][] = 'color_scheme_form_validate';
$form['#submit'][] = 'color_scheme_form_submit';
}
}