diff --git a/src/gui/widgets/annotation_canvas_widget.py b/src/gui/widgets/annotation_canvas_widget.py
index 0611475..930279d 100644
--- a/src/gui/widgets/annotation_canvas_widget.py
+++ b/src/gui/widgets/annotation_canvas_widget.py
@@ -825,7 +825,7 @@ class AnnotationCanvasWidget(QWidget):
         self._add_polyline(img_coords, pen_color, width, annotation_id=annotation_id)
 
         # Store in all_strokes for consistency (uses normalized coordinates)
-        self.all_strokes.append({"points": polyline, "color": color, "alpha": 128, "width": width})
+        self.all_strokes.append({"points": polyline, "color": color, "alpha": 255, "width": width})
 
         logger.debug(f"Drew saved polyline with {len(polyline)} points in color {color}")