diff --git a/Sources/uYouPlusThemes.xm b/Sources/uYouPlusThemes.xm
index a4ec825..8ccf202 100644
--- a/Sources/uYouPlusThemes.xm
+++ b/Sources/uYouPlusThemes.xm
@@ -289,6 +289,15 @@ UIColor* raisedColor = [UIColor colorWithRed:0.035 green:0.035 blue:0.035 alpha:
 }
 %end
 
+%hook UIApplication
+- (void)applicationDidFinishLaunching:(UIApplication *)application {
+    if (@available(iOS 14.0, *)) {
+        self.window.backgroundColor = [UIColor blackColor];
+    }
+    %orig;
+}
+%end
+
 // Others
 %hook _ASDisplayView
 - (void)layoutSubviews {
@@ -573,6 +582,15 @@ UIColor *customHexColor;
 }
 %end
 
+%hook UIApplication
+- (void)applicationDidFinishLaunching:(UIApplication *)application {
+    if (@available(iOS 14.0, *)) {
+        self.window.backgroundColor = [UIColor blackColor];
+    }
+    %orig;
+}
+%end
+
 // Others
 %hook _ASDisplayView
 - (void)layoutSubviews {