Default dashboard_label_background_color to empty

themes/default/css.php

@@ -229,7 +229,7 @@ $dashboard_label_text_color_hover = $_SESSION['theme']['dashboard_label_text_col
 $dashboard_label_text_size = $_SESSION['theme']['dashboard_label_text_size']['text'] ?? '13px';
 $dashboard_label_text_font = $_SESSION['theme']['dashboard_label_text_font']['text'] ?? 'Arial, Calibri, Candara, Segoe, "Segoe UI", Optima, sans-serif';
 $dashboard_label_text_shadow_color = $_SESSION['theme']['dashboard_label_text_shadow_color']['text'] ?? 'rgba(0,0,0,0)';
-$dashboard_label_background_color = $_SESSION['theme']['dashboard_label_background_color']['text'] ?? 'rgba(0,0,0,0)';
+$dashboard_label_background_color = $_SESSION['theme']['dashboard_label_background_color']['text'] ?? '';
 $dashboard_label_background_color_hover = $_SESSION['theme']['dashboard_label_background_color_hover']['text'] ?? '';
 $dashboard_number_text_color = $_SESSION['theme']['dashboard_number_text_color']['text'] ?? '#444';
 $dashboard_number_text_color_hover = $_SESSION['theme']['dashboard_number_text_color_hover']['text'] ?? '';