let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.light)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.tintColor  = UIColor.green
blurEffectView.tag = 999;
let frame:CGRect = CGRect(x: self.internalView.frame.size.width + self.internalView.frame.origin.x, y: self.drawerView.frame.origin.y, width: self.drawerView.frame.size.width - self.internalView.frame.size.width, height: self.drawerView.frame.size.height)

blurEffectView.frame = frame
blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.drawerView.insertSubview(blurEffectView, belowSubview: self.btnClose)

override func viewDidLoad() {
    super.viewDidLoad()

    let visualEffectView = UIVisualEffectView.init(effect: UIBlurEffect.init(style: .light))
    visualEffectView.backgroundColor = UIColor.init(red: 0.0, green: 0.5, blue: 0.0, alpha: 0.5)
    visualEffectView.frame = self.view.bounds
    self.view.addSubview(visualEffectView)

}

visualEffectView.backgroundColor = UIColor.init(red: 0.0, green: 0.5, blue: 0.0, alpha: 0.5)

blurView.backgroundColor = UIColor.red.withAlphaComponent(0.3)