     @objc open dynamic var customContentView: UIView?
     
     /// SeparateView background color
-    @objc open dynamic var separateViewBackgroundColor: UIColor = UIColor.gray {
+    @objc open dynamic var separateViewBackgroundColor: UIColor = UIColor.systemGray {
         didSet {
             separateView.backgroundColor = separateViewBackgroundColor
         }

    case slideFromTopBackToTop
}

open class TTGSnackbar: UIView {
    // MARK: - Class property.
    

                                               name: UIResponder.keyboardWillHideNotification, object: nil)
        
        translatesAutoresizingMaskIntoConstraints = false
        backgroundColor = UIColor.ttgDefaultBackground
        layer.cornerRadius = cornerRadius
        layer.shouldRasterize = true
        layer.rasterizationScale = UIScreen.main.scale
        
        layer.shadowOpacity = 0.4
        layer.shadowRadius = 2
        layer.shadowColor = UIColor.ttgDefaultShadow.cgColor
        layer.shadowOffset = CGSize(width: 0, height: 2)
        
        let contentView = UIView()
