diff --git a/app/src/main/res/drawable/flame_style.xml b/app/src/main/res/drawable/flame_style.xml
index f06f32f..9cc04b9 100644
--- a/app/src/main/res/drawable/flame_style.xml
+++ b/app/src/main/res/drawable/flame_style.xml
@@ -4,7 +4,12 @@
     android:shape="rectangle">
 
     <!-- 背景色 -->
-    <solid android:color="#717070" />
+    <gradient
+        android:angle="45"
+        android:endColor="#A13C3C"
+        android:centerColor="#7F94A1"
+        android:startColor="#057BAC"
+        android:type="linear" />
 
     <!-- 角の丸み -->
     <corners android:radius="15dp" />