diff --git a/iBox/Sources/Base/BaseBottomSheetViewController.swift b/iBox/Sources/Base/BaseBottomSheetViewController.swift
index 02f2de8..85661cf 100644
--- a/iBox/Sources/Base/BaseBottomSheetViewController.swift
+++ b/iBox/Sources/Base/BaseBottomSheetViewController.swift
@@ -104,7 +104,7 @@ class BaseBottomSheetViewController<View: BaseView>: UIViewController {
             $0.height.equalTo(bottomSheetHeight)
         }
         UIView.animate(withDuration: 0.25, delay: 0, options: .curveEaseIn, animations: {
-            self.dimmedView.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.75)
+            self.dimmedView.backgroundColor = ColorPalette.dimmedViewColor
             self.view.layoutIfNeeded()
         })
     }
diff --git a/iBox/Sources/Base/BaseNavigationBarViewController.swift b/iBox/Sources/Base/BaseNavigationBarViewController.swift
index 0193cba..d7a31f2 100644
--- a/iBox/Sources/Base/BaseNavigationBarViewController.swift
+++ b/iBox/Sources/Base/BaseNavigationBarViewController.swift
@@ -52,7 +52,7 @@ class BaseNavigationBarViewController<View: BaseView>: UIViewController, BaseNav
     // MARK: - properties
     
     let backgroundColor: UIColor = .systemBackground
-    let tintColor: UIColor = .black
+    let tintColor: UIColor = .label
     let titleFont: UIFont = .systemFont(ofSize: 20, weight: .semibold)
     
     // MARK: - life cycle
diff --git a/iBox/Sources/Model/Theme.swift b/iBox/Sources/Model/Theme.swift
index 47d97fa..413e934 100644
--- a/iBox/Sources/Model/Theme.swift
+++ b/iBox/Sources/Model/Theme.swift
@@ -27,4 +27,12 @@ enum Theme: Codable, CaseIterable {
         case .system: UIImage(systemName: "circle.righthalf.filled")
         }
     }
+    
+    func toUserInterfaceStyle() -> UIUserInterfaceStyle {
+        switch self {
+        case .light: UIUserInterfaceStyle.light
+        case .dark: UIUserInterfaceStyle.dark
+        case .system: UIUserInterfaceStyle.unspecified
+        }
+    }
 }
diff --git a/iBox/Sources/Presenter/MyPage/MyPageItemCell.swift b/iBox/Sources/Presenter/MyPage/MyPageItemCell.swift
index 3d0619d..1c5cdf6 100644
--- a/iBox/Sources/Presenter/MyPage/MyPageItemCell.swift
+++ b/iBox/Sources/Presenter/MyPage/MyPageItemCell.swift
@@ -15,7 +15,6 @@ class MyPageItemCell: UITableViewCell, BaseViewProtocol {
     
     let titleLabel = UILabel().then {
         $0.font = .systemFont(ofSize: 16)
-        $0.textColor = .black
     }
     
     let descriptionLabel = UILabel().then {
diff --git a/iBox/Sources/Presenter/MyPage/Theme/ThemeCell.swift b/iBox/Sources/Presenter/MyPage/Theme/ThemeCell.swift
index 7c4499b..8a2cbdb 100644
--- a/iBox/Sources/Presenter/MyPage/Theme/ThemeCell.swift
+++ b/iBox/Sources/Presenter/MyPage/Theme/ThemeCell.swift
@@ -12,12 +12,11 @@ class ThemeCell: UITableViewCell, BaseViewProtocol {
     // MARK: - UI
     
     let themeImageView = UIImageView().then {
-        $0.tintColor = .black
+        $0.tintColor = .label
     }
     
     let titleLabel = UILabel().then {
         $0.font = .systemFont(ofSize: 16)
-        $0.textColor = .black
     }
     
     let selectButton = UIButton().then {
diff --git a/iBox/Sources/Presenter/MyPage/Theme/ThemeViewController.swift b/iBox/Sources/Presenter/MyPage/Theme/ThemeViewController.swift
index 5f6da74..5bacd40 100644
--- a/iBox/Sources/Presenter/MyPage/Theme/ThemeViewController.swift
+++ b/iBox/Sources/Presenter/MyPage/Theme/ThemeViewController.swift
@@ -24,11 +24,6 @@ class ThemeViewController: BaseNavigationBarViewController<ThemeView> {
         contentView.tableView.dataSource = self
     }
     
-    override func viewWillDisappear(_ animated: Bool) {
-        super.viewWillDisappear(animated)
-        UserDefaultsManager.theme.value = selected
-    }
-    
     // MARK: - BaseNavigationBarViewControllerProtocol
     
     override func setupNavigationBar() {
@@ -64,7 +59,10 @@ extension ThemeViewController: UITableViewDelegate, UITableViewDataSource {
     // 테이블 뷰 셀이 선택되었을 때 실행되는 메서드
     func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
         selected = Theme.allCases[indexPath.row]
+        guard let window = self.view.window else { return }
+        window.overrideUserInterfaceStyle = selected.toUserInterfaceStyle()
         tableView.reloadData() // 다시 그리기
+        UserDefaultsManager.theme.value = selected
     }
     
 }
diff --git a/iBox/Sources/SceneDelegate.swift b/iBox/Sources/SceneDelegate.swift
index 77d235c..d765cc6 100644
--- a/iBox/Sources/SceneDelegate.swift
+++ b/iBox/Sources/SceneDelegate.swift
@@ -17,6 +17,10 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         window = UIWindow(frame: windowScene.coordinateSpace.bounds)
         window?.windowScene = windowScene
         window?.rootViewController = MainTabBarController()
+        
+        // 앱 테마 정보
+        window?.overrideUserInterfaceStyle = UserDefaultsManager.theme.value.toUserInterfaceStyle()
+        
         window?.makeKeyAndVisible() // 윈도우를 화면에 보여줌
     }
 
diff --git a/iBox/Sources/Presenter/ColorPalette.swift b/iBox/Sources/Utils/ColorPalette.swift
similarity index 79%
rename from iBox/Sources/Presenter/ColorPalette.swift
rename to iBox/Sources/Utils/ColorPalette.swift
index da77a9b..433334c 100644
--- a/iBox/Sources/Presenter/ColorPalette.swift
+++ b/iBox/Sources/Utils/ColorPalette.swift
@@ -62,5 +62,15 @@ struct ColorPalette {
         }
     }()
     
+    public static var dimmedViewColor = {
+        return UIColor { (UITraitCollection: UITraitCollection) -> UIColor in
+            if UITraitCollection.userInterfaceStyle == .dark {
+                return UIColor(red: 0.1, green: 0.1, blue: 0.1, alpha: 0.75)
+            } else {
+                return UIColor(red: 0, green: 0, blue: 0, alpha: 0.75)
+            }
+        }
+    }()
+    
 }