UIBezierPath border color

UIBezierPath.swift

        // Add border
        let gradient = CAGradientLayer()
        let size = CGSize(width: avatarSize, height: avatarSize)
        let rect = CGRect(origin: .zero, size: size)
        gradient.frame =  CGRect(origin: CGPoint.zero, size: size)
        gradient.colors = [UIColor.blue.cgColor, UIColor.green.cgColor]
        
        let shape = CAShapeLayer()
        shape.lineWidth = 5
        shape.path = UIBezierPath(rect: rect).cgPath
        shape.strokeColor = UIColor.black.cgColor
        shape.fillColor = UIColor.clear.cgColor
        gradient.mask = shape
        
        chatOpponentAvatar.layer.addSublayer(shape)

Thanks so much!
Helped me too 🧡