Complementry color for any color iOS swift

 Solution:

You can use this extension for getting the complementary colour for any colours in iOS swift.

extension UIColor {

var compColor: UIColor {
        
        let ciColor = CIColor(color: self)
        
        let compRed: CGFloat = 1.0 - ciColor.red
        let compGreen: CGFloat = 1.0 - ciColor.green
        let compBlue: CGFloat = 1.0 - ciColor.blue
        
        return UIColor(red: compRed, green: compGreen, blue: compBlue, alpha: ciColor.alpha)
    }

}