How to change selected color for table view cell?

You can do either one of this -

1. Change the selectionStyle property of your cell.

For example: If you change it to UITableViewCellSelectionStyleGray, it will be gray.

 cell.selectionStyle = UITableViewCellSelectionStyleGray;

2. Change the selectedBackgroundView property.

   let bgColorView = UIView()
   bgColorView.backgroundColor = UIColor.red
   cell.selectedBackgroundView = bgColorView
   

swift 4 correction:

    cell.selectionStyle = UITableViewCellSelectionStyle.gray

Maybe you need this:

cell.selectedBackgroundView

you can set the Selected Background view in awakeFromNib method

class MyCell: UITableViewCell {
     override func awakeFromNib() {
            super.awakeFromNib()
            // Initialization code
            selectedBackgroundView = {
                let view = UIView.init()
                view.backgroundColor = .white
                return view
            }()
        }
}