diff --git a/core/modules/color/color.module b/core/modules/color/color.module
index 7809f5f..55fb862 100644
--- a/core/modules/color/color.module
+++ b/core/modules/color/color.module
@@ -164,6 +164,7 @@ function color_get_palette($theme, $default = FALSE) {
  * @ingroup forms
  */
 function color_scheme_form($complete_form, &$form_state, $theme) {
+  echo "<pre>\n", debug_print_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS), "</pre>\n";
   $base = drupal_get_path('module', 'color');
   $info = color_get_info($theme);