diff --git a/lib/widgets/map_widget.dart b/lib/widgets/map_widget.dart
index c32c90e..f5a4721 100644
--- a/lib/widgets/map_widget.dart
+++ b/lib/widgets/map_widget.dart
@@ -105,24 +105,37 @@ class MapWidget extends StatelessWidget {
           child: Align(
             alignment: Alignment.center,
             child: Container(
-                color: Colors.purple.withOpacity(0.4),
+                color: Colors.purple.withOpacity(0.2),
                 // child: Text(TextUtils.getDisplayTextFeture(i),
                 //     style: const TextStyle(
                 //       fontSize: 16,
                 //       fontWeight: FontWeight.bold,
                 //       color: Colors.red,
                 //     ))),
-                child: Text(
-                  TextUtils.getDisplayTextFeture(i),
-                  style: TextStyle(
-                    fontSize: 16,
-                    fontWeight: FontWeight.w700,
-                    // アウトラインの色と幅を設定
-                    foreground: Paint()
-                      ..style = PaintingStyle.stroke
-                      ..strokeWidth = 1
-                      ..color = Colors.black,
-                  ),
+                child: Stack(
+                  children: <Widget>[
+                    // Text with white outline
+                    Text(
+                      TextUtils.getDisplayTextFeture(i),
+                      style: TextStyle(
+                        fontSize: 16,
+                        fontWeight: FontWeight.w700,
+                        foreground: Paint()
+                          ..style = PaintingStyle.stroke
+                          ..strokeWidth = 1
+                          ..color = Colors.white,
+                      ),
+                    ),
+                    // Text with black fill
+                    Text(
+                      TextUtils.getDisplayTextFeture(i),
+                      style: TextStyle(
+                        fontSize: 16,
+                        fontWeight: FontWeight.w700,
+                        color: Colors.black,
+                      ),
+                    ),
+                  ],
                 )),
           ),
         )