fix: compare with correct color for marking selected

ImageViewer/ViewController.swift

@@ -2130,14 +2130,17 @@ func convertPageTurnModeToString(_ pageTurnMode: PageTurnMode) -> String {
 }
 
 extension ViewController {
-    private func colorItems(applyTo colorHandler: @escaping (UIColor) -> Void) -> [SettingsMenuItem] {
+    private func colorItems(
+        previous: UIColor,
+        applyTo colorHandler: @escaping (UIColor) -> Void
+    ) -> [SettingsMenuItem] {
         let items: [UIColor] = [.black, .white, .red, .blue]
         return items.map { color in
             SettingsMenuItem(title: convertColorToString(color), children: nil, action: { [weak self] in
                 colorHandler(color)
                 self?.dismiss(animated: false)
             },
-            selected: { [weak self] in self?.readerView.backgroundColor == color })
+            selected: { previous == color })
         }
     }
 
@@ -2207,15 +2210,19 @@ extension ViewController {
     }
 
     private func makeSettingsTree() -> [SettingsMenuItem] {
-        let backgroundColors = colorItems { [weak self] color in
-            self?.homeView.backgroundColor = color
-            self?.settings.homeBackgroundColor = self?.convertColorToString(color) ?? "White"
-            self?.saveSettings()
-        }
-        let defaultReadingBackgroundColor = colorItems { [weak self] color in
-            self?.settings.defaultReadingBackgroundColor = self?.convertColorToString(color) ?? "Black"
-            self?.saveSettings()
-        }
+        let backgroundColors = colorItems(previous: homeView.backgroundColor ??
+            convertStringToColor(settings.homeBackgroundColor),
+            applyTo: { [weak self] color in
+                self?.homeView.backgroundColor = color
+                self?.settings.homeBackgroundColor = self?.convertColorToString(color) ?? "White"
+                self?.saveSettings()
+            })
+        let defaultReadingBackgroundColor = colorItems(previous: readerView.backgroundColor ??
+            convertStringToColor(settings.defaultReadingBackgroundColor),
+            applyTo: { [weak self] color in
+                self?.settings.defaultReadingBackgroundColor = self?.convertColorToString(color) ?? "Black"
+                self?.saveSettings()
+            })
         let defaultPageTurnMode = pageTurnItems { [weak self] pageTurnMode in
             self?.settings.defaultPageTurnMode = pageTurnMode
             self?.saveSettings()