Why are the colors I assign to UIControls not the colors that show up?

Since iOS 13, the colors getting assigned to UIControls don't seem to be the same colors that ultimately end up getting displayed.

Here is an example that can be copy & pasted into an xcode playground:

import UIKit
import PlaygroundSupport

// https://www.hackingwithswift.com/example-code/uicolor/how-to-convert-a-hex-color-to-a-uicolor
extension UIColor {
  public convenience init?(hex hexUser: String) {
  let r, g, b, a: CGFloat

  let hex = "\(hexUser)FF" // append alpha compnent for ease of example

  if hex.hasPrefix("#") {
  let start = hex.index(hex.startIndex, offsetBy: 1)
  let hexColor = String(hex[start...])

  if hexColor.count == 8 {
  let scanner = Scanner(string: hexColor)
  var hexNumber: UInt64 = 0

  if scanner.scanHexInt64(&hexNumber) {
  r = CGFloat((hexNumber & 0xff000000) >> 24) / 255
  g = CGFloat((hexNumber & 0x00ff0000) >> 16) / 255
  b = CGFloat((hexNumber & 0x0000ff00) >> 8) / 255
  a = CGFloat(hexNumber & 0x000000ff) / 255

  self.init(red: r, green: g, blue: b, alpha: a)
  return
  }
  }
  }

  return nil
  }
}


let backgroundColorHex = "#303b46" // shows up as #38424c in iOS >= 13
let tintColorHex = "#ebdb34" // shows up as #eadb33 in iOS >= 13

let backgroundColor = UIColor(hex: backgroundColorHex)!
let tintColor = UIColor(hex: tintColorHex)!

class MyViewController: UIViewController {
  override func loadView() {
  let view = UIView()
  view.backgroundColor = .white

  let segmentedControl = UISegmentedControl(items: ["One", "Two"])
  segmentedControl.selectedSegmentTintColor = tintColor
  segmentedControl.backgroundColor = backgroundColor
  segmentedControl.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.white], for: .normal)
  segmentedControl.selectedSegmentIndex = 0
  view.addSubview(segmentedControl)

  segmentedControl.translatesAutoresizingMaskIntoConstraints = false
  segmentedControl.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
  segmentedControl.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
  segmentedControl.widthAnchor.constraint(equalToConstant: 200).isActive = true
  self.view = view
  }
}

PlaygroundPage.current.liveView = MyViewController()

For this

UISegmentedControl

selectedSegmentTintColor

SGkx3.png

pzNl8.png

Does anyone know what mechanisms are in play here for my assigned color to not actually get displayed as assigned? Along with the best way to deal with these inconsistencies when working with design? Thank you.