diff --git a/Demo/DemoListViewController.swift b/Demo/DemoListViewController.swift
index bc8f06e..3c6638f 100644
--- a/Demo/DemoListViewController.swift
+++ b/Demo/DemoListViewController.swift
@@ -130,11 +130,14 @@ class DemoListViewController: UITableViewController, NohanaImagePickerController
     func showCustomUIPicker() {
         let picker = NohanaImagePickerController()
         picker.delegate = self
-        picker.config.color.background = .lightGray
+        picker.config.color.background = UIColor(red: 0xcc/0xff, green: 0xff/0xff, blue: 0xff/0xff, alpha: 1)
+        picker.config.color.separator = UIColor(red: 0x00/0xff, green: 0x66/0xff, blue: 0x66/0xff, alpha: 1)
+        picker.config.strings.albumListTitle = "🏞"
+        picker.config.image.droppedSmall = UIImage(named: "btn_select_m")
+        picker.config.image.pickedSmall = UIImage(named: "btn_selected_m")
         present(picker, animated: true, completion: nil)
     }
     
-    
     // MARK: - NohanaImagePickerControllerDelegate
     
     func nohanaImagePickerDidCancel(_ picker: NohanaImagePickerController) {
diff --git a/NohanaImagePicker/AlbumListEmptyIndicator.swift b/NohanaImagePicker/AlbumListEmptyIndicator.swift
index 085b1ec..5db4d3f 100644
--- a/NohanaImagePicker/AlbumListEmptyIndicator.swift
+++ b/NohanaImagePicker/AlbumListEmptyIndicator.swift
@@ -23,14 +23,14 @@ class AlbumListEmptyIndicator: UILabel {
         centerStyle.alignment = NSTextAlignment.center
         
         let messageAttributes = [
-            NSForegroundColorAttributeName : config.color.empty,
+            NSForegroundColorAttributeName : config.color.empty ?? UIColor(red: 0x88/0xff, green: 0x88/0xff, blue: 0x88/0xff, alpha: 1),
             NSFontAttributeName : UIFont.systemFont(ofSize: 26),
             NSParagraphStyleAttributeName : centerStyle
         ]
         let messageText = NSAttributedString(string: message, attributes: messageAttributes)
         
         let descriptionAttributes = [
-            NSForegroundColorAttributeName : config.color.empty,
+            NSForegroundColorAttributeName : config.color.empty ?? UIColor(red: 0x88/0xff, green: 0x88/0xff, blue: 0x88/0xff, alpha: 1),
             NSFontAttributeName : UIFont.systemFont(ofSize: 14),
             NSParagraphStyleAttributeName : centerStyle
         ]
diff --git a/NohanaImagePicker/AlbumListViewController.swift b/NohanaImagePicker/AlbumListViewController.swift
index 1ebf67f..35db63b 100644
--- a/NohanaImagePicker/AlbumListViewController.swift
+++ b/NohanaImagePicker/AlbumListViewController.swift
@@ -41,13 +41,13 @@ class AlbumListViewController: UITableViewController, EmptyIndicatable, Activity
     override func viewDidLoad() {
         super.viewDidLoad()
         if let nohanaImagePickerController = nohanaImagePickerController {
-            title = NSLocalizedString("albumlist.title", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: "")
+            view.backgroundColor = nohanaImagePickerController.config.color.background ?? .white
+            title = nohanaImagePickerController.config.strings.albumListTitle ?? NSLocalizedString("albumlist.title", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: "")
             setUpToolbarItems()
             navigationController?.setToolbarHidden(nohanaImagePickerController.toolbarHidden ,animated: false)
         }
         setUpEmptyIndicator()
         setUpActivityIndicator()
-        self.view.backgroundColor = nohanaImagePickerController?.config.color.background
     }
     
     deinit {
@@ -140,7 +140,7 @@ class AlbumListViewController: UITableViewController, EmptyIndicatable, Activity
             }
             if let nohanaImagePickerController = nohanaImagePickerController {
                 cell.config = nohanaImagePickerController.config
-                cell.titleLabel?.text = NSLocalizedString("albumlist.moment.title", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: "")
+                cell.titleLabel?.text = nohanaImagePickerController.config.strings.albumListMomentTitle ?? NSLocalizedString("albumlist.moment.title", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: "")
             }
             return cell
         case .albums:
@@ -221,8 +221,8 @@ class AlbumListViewController: UITableViewController, EmptyIndicatable, Activity
             return
         }
         emptyIndicator = AlbumListEmptyIndicator(
-            message: NSLocalizedString("albumlist.empty.message", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: ""),
-            description: NSLocalizedString("albumlist.empty.description", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: ""),
+            message: nohanaImagePickerController.config.strings.albumListEmptyMessage ?? NSLocalizedString("albumlist.empty.message", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: ""),
+            description: nohanaImagePickerController.config.strings.albumListEmptyDescription ?? NSLocalizedString("albumlist.empty.description", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: ""),
             frame: frame,
             config: nohanaImagePickerController.config)
     }
@@ -274,11 +274,11 @@ extension UIViewController {
             return
         }
         if nohanaImagePickerController.maximumNumberOfSelection == 0 {
-            let title = String(format: NSLocalizedString("toolbar.title.nolimit", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: ""),
+            let title = String(format: nohanaImagePickerController.config.strings.toolbarTitleNoLimit ?? NSLocalizedString("toolbar.title.nolimit", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: ""),
                 nohanaImagePickerController.pickedAssetList.count)
             infoButton.title = title
         } else {
-            let title = String(format: NSLocalizedString("toolbar.title.haslimit", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: ""),
+            let title = String(format: nohanaImagePickerController.config.strings.toolbarTitleHasLimit ?? NSLocalizedString("toolbar.title.haslimit", tableName: "NohanaImagePicker", bundle: nohanaImagePickerController.assetBundle, comment: ""),
                 nohanaImagePickerController.pickedAssetList.count,
                 nohanaImagePickerController.maximumNumberOfSelection)
             infoButton.title = title
diff --git a/NohanaImagePicker/AssetListViewController.swift b/NohanaImagePicker/AssetListViewController.swift
index b8fb615..d9d9a5d 100644
--- a/NohanaImagePicker/AssetListViewController.swift
+++ b/NohanaImagePicker/AssetListViewController.swift
@@ -24,10 +24,10 @@ class AssetListViewController: UICollectionViewController {
     
     override func viewDidLoad() {
         super.viewDidLoad()
+        view.backgroundColor = nohanaImagePickerController?.config.color.background ?? .white
         updateTitle()
         setUpToolbarItems()
         addPickPhotoKitAssetNotificationObservers()
-        self.view.backgroundColor = nohanaImagePickerController?.config.color.background
     }
     
     var cellSize: CGSize {
diff --git a/NohanaImagePicker/MomentCell.swift b/NohanaImagePicker/MomentCell.swift
index 7f5208d..55926fc 100644
--- a/NohanaImagePicker/MomentCell.swift
+++ b/NohanaImagePicker/MomentCell.swift
@@ -22,7 +22,8 @@ class MomentCell: AlbumCell {
     override func draw(_ rect: CGRect) {
         super.draw(rect)
         let lineWidth: CGFloat = 1 / UIScreen.main.scale
-        config.color.separator.setFill()
+        let separatorColor: UIColor = config.color.separator ?? UIColor(red: 0xbb/0xff, green: 0xbb/0xff, blue: 0xbb/0xff, alpha: 1)
+        separatorColor.setFill()
         UIRectFill(CGRect(x: 16, y: frame.size.height - lineWidth, width: frame.size.width, height:lineWidth))
     }
 
diff --git a/NohanaImagePicker/NohanaImagePickerController.swift b/NohanaImagePicker/NohanaImagePickerController.swift
index ee7ea18..d777016 100644
--- a/NohanaImagePicker/NohanaImagePickerController.swift
+++ b/NohanaImagePicker/NohanaImagePickerController.swift
@@ -141,11 +141,11 @@ open class NohanaImagePickerController: UIViewController {
 extension NohanaImagePickerController {
     public struct Config {
         public struct Color {
-            public var background: UIColor = .white
-            public var empty: UIColor = UIColor(red: 0x88/0xff, green: 0x88/0xff, blue: 0x88/0xff, alpha: 1)
-            public var separator: UIColor = UIColor(red: 0xbb/0xff, green: 0xbb/0xff, blue: 0xbb/0xff, alpha: 1)
+            public var background: UIColor?
+            public var empty: UIColor?
+            public var separator: UIColor?
         }
-        public var color: Color = Color()
+        public var color = Color()
         
         public struct Image {
             public var pickedSmall: UIImage?
@@ -153,7 +153,16 @@ extension NohanaImagePickerController {
             public var droppedSmall: UIImage?
             public var droppedLarge: UIImage?
         }
-        public var image: Image = Image()
+        public var image = Image()
+        
+        public struct Strings {
+            public var albumListTitle: String?
+            public var albumListMomentTitle: String?
+            public var albumListEmptyMessage: String?
+            public var albumListEmptyDescription: String?
+            public var toolbarTitleNoLimit: String?
+            public var toolbarTitleHasLimit: String?
+        }
+        public var strings = Strings()
     }
-    
 }