diff --git a/frontend/images/ui-bg_gloss-wave_35_red_500x100.png b/frontend/images/ui-bg_gloss-wave_35_red_500x100.png
new file mode 100644
index 0000000..ed56cca
Binary files /dev/null and b/frontend/images/ui-bg_gloss-wave_35_red_500x100.png differ
diff --git a/frontend/stylesheets/style.css b/frontend/stylesheets/style.css
index 2bc2944..cb18e91 100644
--- a/frontend/stylesheets/style.css
+++ b/frontend/stylesheets/style.css
@@ -128,3 +128,8 @@ tbody tr td {
 	text-align: center;
 	color: grey;
 }
+
+/* additional theming for user interface */
+.ui-error .ui-widget-header {
+	background-image: url("../images/ui-bg_gloss-wave_35_red_500x100.png");
+}