diff --git a/app/src/main/java/com/kunfei/bookshelf/view/fragment/ThemeSettingsFragment.java b/app/src/main/java/com/kunfei/bookshelf/view/fragment/ThemeSettingsFragment.java
index 1caaba44ab..386f000e39 100644
--- a/app/src/main/java/com/kunfei/bookshelf/view/fragment/ThemeSettingsFragment.java
+++ b/app/src/main/java/com/kunfei/bookshelf/view/fragment/ThemeSettingsFragment.java
@@ -14,6 +14,7 @@
 import com.kunfei.bookshelf.MApplication;
 import com.kunfei.bookshelf.R;
 import com.kunfei.bookshelf.help.RxBusTag;
+import com.kunfei.bookshelf.utils.ColorUtil;
 import com.kunfei.bookshelf.utils.Theme.ATH;
 import com.kunfei.bookshelf.view.activity.ThemeSettingActivity;
 
@@ -72,6 +73,7 @@ public void onPause() {
 
     @Override
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        AlertDialog alertDialog;
         switch (key) {
             case "immersionStatusBar":
             case "navigationBarColorChange":
@@ -81,24 +83,55 @@ public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, Strin
             case "colorPrimary":
             case "colorAccent":
             case "colorBackground":
-                MApplication.getInstance().upThemeStore();
-                RxBus.get().post(RxBusTag.RECREATE, true);
-                if (!settingActivity.isNightTheme()) {
-                    new Handler().postDelayed(() -> getActivity().recreate(), 200);
+                if (!ColorUtil.isColorLight(sharedPreferences.getInt("colorBackground", settingActivity.getResources().getColor(R.color.md_grey_100)))) {
+                    alertDialog = new AlertDialog.Builder(getActivity())
+                            .setTitle("白天背景太暗")
+                            .setMessage("将会恢复默认背景？")
+                            .setPositiveButton(R.string.ok, (dialog, which) -> {
+                                settingActivity.preferences.edit().putInt("colorBackground", settingActivity.getResources().getColor(R.color.md_grey_100)).apply();
+                                upTheme(false);
+                            })
+                            .setNegativeButton(R.string.cancel, (dialogInterface, i) -> {
+                                upTheme(false);
+                            })
+                            .show();
+                    ATH.setAlertDialogTint(alertDialog);
+                } else {
+                    upTheme(false);
                 }
                 break;
             case "colorPrimaryNight":
             case "colorAccentNight":
             case "colorBackgroundNight":
-                MApplication.getInstance().upThemeStore();
-                RxBus.get().post(RxBusTag.RECREATE, true);
-                if (settingActivity.isNightTheme()) {
-                    new Handler().postDelayed(() -> getActivity().recreate(), 200);
+                if (ColorUtil.isColorLight(sharedPreferences.getInt("colorBackgroundNight", settingActivity.getResources().getColor(R.color.md_grey_800)))) {
+                    alertDialog = new AlertDialog.Builder(getActivity())
+                            .setTitle("夜间背景太亮")
+                            .setMessage("将会恢复默认背景？")
+                            .setPositiveButton(R.string.ok, (dialog, which) -> {
+                                settingActivity.preferences.edit().putInt("colorBackgroundNight", settingActivity.getResources().getColor(R.color.md_grey_800)).apply();
+                                upTheme(true);
+                            })
+                            .setNegativeButton(R.string.cancel, (dialogInterface, i) -> {
+                                upTheme(true);
+                            })
+                            .show();
+                    ATH.setAlertDialogTint(alertDialog);
+
+                } else {
+                    upTheme(true);
                 }
                 break;
         }
     }
 
+    private void upTheme(boolean isNightTheme) {
+        if (settingActivity.isNightTheme() == isNightTheme) {
+            MApplication.getInstance().upThemeStore();
+            RxBus.get().post(RxBusTag.RECREATE, true);
+            new Handler().postDelayed(() -> getActivity().recreate(), 200);
+        }
+    }
+
     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
         if (Objects.equals(preference.getKey(), "defaultTheme")) {