Set background color for top safe area only in iOS 11

I'm new to Swift. I have set my top bar programmatically.It works fine for all versions except for iOS version 11.

I want to change the background color of the safe area in iPhone X. Presently I have just added the following code to hide the status bar.

 override var prefersStatusBarHidden: Bool {
    return true
}

I have created top bar using code:

//Top Bar
    let topBar = UIView(frame:CGRect(x: 0,y: 0, width: width, height: 60))
    topBar.backgroundColor = UIColor.white
    topBar.layer.shadowColor = UIColor.gray.cgColor
    topBar.layer.shadowOffset = CGSize(width: 0, height: 3)
    topBar.layer.shadowOpacity = 1
    topBar.layer.masksToBounds = false
    topBar.layer.shadowRadius = 8.0;
    //ImageView - Back Button
    let backBtn = UIButton(frame:CGRect(x: 25, y: 18, width: 18, height: 34))
    let backBtnImage = UIImage(named: "back_button") as UIImage?
    backBtn.setImage(backBtnImage, for: .normal)
    backBtn.layer.masksToBounds = true
    backBtn.addTarget(self,action:#selector(backButtonClicked),
                      for:.touchUpInside)
    //Label - Title
    let titleLabel = UILabel(frame:CGRect(x: width * 0.3, y: 13, width: width * 0.55, height: 40))
    titleLabel.text = "Favorites"
    titleLabel.contentMode = UIViewContentMode.center
    //include all in view
    topBar.addSubview(titleLabel)
    topBar.addSubview(backBtn)

    containerView.addSubview(topBar)

Is there a way in which i can do it without using UINavigationBar or setting status bar.