     /// The main brand color for interface callout content.
     public let tintColor: UIColor
 
-    /// The color for borders or divider lines that hide any underlying content.
+    /// The color for divider lines that hide any underlying content.
     public let separatorColor: UIColor
+
+    /// The color for borders lines that hide any underlying content.
+    public let borderColor: UIColor
 
     /// The color for toggle controls (e.g., Switch or Checkbox).
     public let toggleColor: UIColor

        id: .dark,
        tintColor: .systemTint,
        separatorColor: .lightGray,
        toggleColor: .appleGreen,
        linkColor: .systemTint,
        textColor: .lightText,

        self.isDark = isDark
        self.tintColor = tintColor
        self.separatorColor = separatorColor
        self.borderColor = borderColor
        self.toggleColor = toggleColor
        self.linkColor = linkColor
        self.textColor = textColor
