diff --git a/lib/widgets/text_line.dart b/lib/widgets/text_line.dart
index 3cb9cb5a..d060437d 100644
--- a/lib/widgets/text_line.dart
+++ b/lib/widgets/text_line.dart
@@ -221,8 +221,7 @@ class TextLine extends StatelessWidget {
     }
 
     if (!s.startsWith('#')) {
-      // give a default color
-      return Colors.transparent;
+      throw("Color code not supported");
     }
 
     String hex = s.replaceFirst('#', '');