add webControlButtonBackground to colors

apple/OmnivoreKit/Sources/App/Views/WebReader/WebReaderContainer.swift

@@ -353,7 +353,7 @@ struct WebReaderContainerView: View {
           if showBottomBar {
             bottomButtons
               .frame(height: 48)
-              .background(Color.isDarkMode ? Color(red: 44 / 255.0, green: 44 / 255.0, blue: 46 / 255.0) : Color.white)
+              .background(Color.webControlButtonBackground)
               .cornerRadius(6)
               .padding(.bottom, 34)
               .shadow(color: .gray.opacity(0.13), radius: 8, x: 0, y: 4)

apple/OmnivoreKit/Sources/Views/Colors/Colors.swift

@@ -19,6 +19,7 @@ public extension Color {
   static var appTextDefault: Color { Color("_utilityTextDefault", bundle: .module) }
   static var appPrimaryBackground: Color { Color("_appPrimaryBackground", bundle: .module) }
   static var checkmarkBlue: Color { Color("_checkmarkBlue", bundle: .module) }
+  static var webControlButtonBackground: Color { Color("_webControlButtonBackground", bundle: .module) }
 
   // Apple system UIColor equivalents
   #if os(iOS)

apple/OmnivoreKit/Sources/Views/Colors/Colors.xcassets/_webControlButtonBackground.colorset/Contents.json

@@ -0,0 +1,38 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "1.000",
+          "green" : "1.000",
+          "red" : "1.000"
+        }
+      },
+      "idiom" : "universal"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "46",
+          "green" : "44",
+          "red" : "44"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}