Fun: Make each tab have its own color theme

App/Browser View/BrowserViewController.swift

@@ -308,6 +308,9 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
         // Show tab bar view?
         browserView.tabBarViewVisible = tabController.tabs.count > 1
         
+        // Color theme
+        browserView.titlebarView.setColorTheme(tab.colorTheme)
+        
         // Load progress
         updateLoadProgress(forWebView: webView)
         loadingObservation = webView.observe(\.estimatedProgress) { [unowned self] (webView, observedChange) in

App/Tabs/Tab.swift

@@ -40,6 +40,25 @@ class Tab: NSObject, SBRProcessBundleBridgeDelegate
         didSet { bridge.allowAllScripts = javaScriptEnabled }
     }
     
+    public lazy var colorTheme: [UIColor] = {
+        // Looks really cool as-is, but maybe compute a color based on the
+        // title or URL to make it show up the same for each website? 
+        return [
+            UIColor(
+                hue: CGFloat.random(in: 0...1.0),
+                saturation: 0.89,
+                brightness: 0.3,
+                alpha: 1.0
+            ),
+            UIColor(
+                hue: CGFloat.random(in: 0...1.0),
+                saturation: 1.0,
+                brightness: 0.7,
+                alpha: 1.0
+            ),
+        ]
+    }()
+    
     public var identifier = UUID()
     
     public var favicon: UIImage?

App/Titlebar and URL Bar/TitlebarView.swift

@@ -51,6 +51,10 @@ class TitlebarView: UIView
             titleLabelView.attributedText = NSAttributedString(string: appName, attributes: titleAttributes)
         }
     }
+    
+    func setColorTheme(_ colorTheme: [UIColor]) {
+        backgroundView.colors = colorTheme
+    }
         
     override func layoutSubviews() {
         super.layoutSubviews()