diff --git a/MetaballsKit/PreferencesViewController.swift b/MetaballsKit/PreferencesViewController.swift
index 5f9cb82..04ddaef 100644
--- a/MetaballsKit/PreferencesViewController.swift
+++ b/MetaballsKit/PreferencesViewController.swift
@@ -11,6 +11,15 @@ import Cocoa
 internal let PreferencesDidChange_Color = Notification.Name("PreferencesDidChange_Color")
 
 class PreferencesViewController: NSViewController {
+    private static var styleItems: [(name: String, tag: Int)] {
+        return [
+            (name: NSLocalizedString("Single Color", comment: "single color menu item"),
+             tag: Int(ColorStyle.singleColor.rawValue)),
+            (name: NSLocalizedString("Two Color Gradient — Horizontal", comment: "two color horizontal gradient menu item"),
+             tag: Int(ColorStyle.gradient2Horizontal.rawValue)),
+        ]
+    }
+
     public var defaults = UserDefaults.standard
 
     private var colorStackView = NSStackView()
@@ -21,8 +30,13 @@ class PreferencesViewController: NSViewController {
         button.translatesAutoresizingMaskIntoConstraints = false
 
         let menu = NSMenu()
-        menu.addItem(withTitle: NSLocalizedString("Single Color", comment: "single color menu item"), action: nil, keyEquivalent: "")
-        menu.addItem(withTitle: NSLocalizedString("Two Color Gradient — Horizontal", comment: "two color horizontal gradient menu item"), action: nil, keyEquivalent: "")
+        for item in PreferencesViewController.styleItems {
+            // TODO: Set action here.
+            let menuItem = NSMenuItem(title: item.name, action: nil, keyEquivalent: "")
+            menuItem.target = self
+            menuItem.tag = item.tag
+            menu.addItem(menuItem)
+        }
         button.menu = menu
 
         return button