Google Image looks blue

I have the following code

import UIKit

class AuthViewController: UIViewController {
    private let scrollView = UIScrollView()
    private let containerView = UIView()

    // MARK: - Login Form Elements
    private let titleLabel = UILabel()
    private let emailTextField = UITextField()
    private let passwordTextField = UITextField()
    private let loginButton = UIButton(type: .system)
    private let alreadyHaveAccountButton = UIButton(type: .system)
    private let forgotPasswordButton = UIButton(type: .system)
    private let loginWithAppleButton = UIButton(type: .system)

    // MARK: - Signup Form Elements
    private let firstNameTextField = UITextField()
    private let lastNameTextField = UITextField()
    private let signupEmailTextField = UITextField()
    private let signupPasswordTextField = UITextField()
    private let signupSubmitButton = UIButton(type: .system)

    private var isSignupFormVisible = false

    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white
        setupScrollView()
        setupLoginForm()
        //setupSignupForm()
        // toggleSignupFormVisibility(show: false)
    }

    private func setupScrollView() {
        view.addSubview(scrollView)
        scrollView.translatesAutoresizingMaskIntoConstraints = false
        scrollView.addSubview(containerView)
        containerView.translatesAutoresizingMaskIntoConstraints = false

        NSLayoutConstraint.activate([
            scrollView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
            scrollView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            scrollView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor),

            containerView.topAnchor.constraint(equalTo: scrollView.topAnchor),
            containerView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor),
            containerView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor),
            containerView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor),
            containerView.widthAnchor.constraint(equalTo: scrollView.widthAnchor)
        ])
    }

    private func setupLoginForm() {
        let stackView = UIStackView(arrangedSubviews: [
            titleLabel,
            createTextField(placeholder: "Email", textField: emailTextField),
            createTextField(placeholder: "Password", textField: passwordTextField, isSecure: true),
            loginButton,
            createGoogleSignInButton(),
            loginWithAppleButton,
            alreadyHaveAccountButton,
            forgotPasswordButton
        ])
        stackView.axis = .vertical
        stackView.spacing = 12
        stackView.translatesAutoresizingMaskIntoConstraints = false
        containerView.addSubview(stackView)

        titleLabel.text = "Login"
        titleLabel.textAlignment = .center
        titleLabel.font = UIFont(name: "Inter-Bold", size: 24)
        loginButton.setTitle("Login", for: .normal)
        loginButton.titleLabel?.font = UIFont(name: "Inter-Bold", size: 18)
        forgotPasswordButton.titleLabel?.font = UIFont(name: "Inter-Regular", size: 16)
        forgotPasswordButton.setTitle("Forgot Password?", for: .normal)
        loginWithAppleButton.titleLabel?.font = UIFont(name: "Inter-Regular", size: 16)
        loginWithAppleButton.setTitle("Login with Apple", for: .normal)
        alreadyHaveAccountButton.setTitle("Don't have an account? Sign Up", for: .normal)
        alreadyHaveAccountButton.titleLabel?.font = UIFont(name: "Inter-Regular", size: 16)

        alreadyHaveAccountButton.addTarget(self, action: #selector(switchToSignupForm), for: .touchUpInside)

        NSLayoutConstraint.activate([
            stackView.topAnchor.constraint(equalTo: containerView.safeAreaLayoutGuide.topAnchor, constant: 50),
            stackView.centerYAnchor.constraint(equalTo: containerView.centerYAnchor),
            stackView.leadingAnchor.constraint(equalTo: containerView.leadingAnchor, constant: 20),
            stackView.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: -20)
        ])
    }

    private func setupSignupForm() {
        let stackView = UIStackView(arrangedSubviews: [
            titleLabel,
            createTextField(placeholder: "First Name", textField: firstNameTextField),
            createTextField(placeholder: "Last Name", textField: lastNameTextField),
            createTextField(placeholder: "Email", textField: signupEmailTextField),
            createTextField(placeholder: "Password", textField: signupPasswordTextField, isSecure: true),
            signupSubmitButton,
            loginWithAppleButton,
            createGoogleSignInButton(),
            alreadyHaveAccountButton
        ])
        stackView.axis = .vertical
        stackView.spacing = 12
        stackView.translatesAutoresizingMaskIntoConstraints = false
        containerView.addSubview(stackView)

        titleLabel.text = "Sign Up"
        titleLabel.textAlignment = .center
        titleLabel.font = UIFont(name: "Inter-Bold", size: 24)
        signupSubmitButton.setTitle("Sign Up", for: .normal)
        signupSubmitButton.titleLabel?.font = UIFont(name: "Inter-Bold", size: 18)
        alreadyHaveAccountButton.titleLabel?.font = UIFont(name: "Inter-Regular", size: 16)
        alreadyHaveAccountButton.setTitle("Already have an account? Login", for: .normal)
        loginWithAppleButton.setTitle("Sign Up with Apple", for: .normal)

        alreadyHaveAccountButton.addTarget(self, action: #selector(switchToLoginForm), for: .touchUpInside)

        NSLayoutConstraint.activate([
            stackView.topAnchor.constraint(equalTo: containerView.safeAreaLayoutGuide.topAnchor, constant: 50),
            stackView.centerYAnchor.constraint(equalTo: containerView.centerYAnchor),
            stackView.leadingAnchor.constraint(equalTo: containerView.leadingAnchor, constant: 20),
            stackView.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: -20)
        ])
    }

    @objc private func switchToSignupForm() {
        for subview in containerView.subviews {
            subview.removeFromSuperview()
        }
        setupSignupForm()
    }

    @objc private func switchToLoginForm() {
        for subview in containerView.subviews {
            subview.removeFromSuperview()
        }
        setupLoginForm()
    }

    private func createTextField(placeholder: String, textField: UITextField, isSecure: Bool = false) -> UITextField {
        textField.placeholder = placeholder
        textField.borderStyle = .roundedRect
        textField.isSecureTextEntry = isSecure
        textField.translatesAutoresizingMaskIntoConstraints = false
        textField.heightAnchor.constraint(equalToConstant: 50).isActive = true
        textField.layer.borderWidth = 1
        textField.layer.borderColor = UIColor.black.cgColor
        return textField
    }
    
    private func createGoogleSignInButton() -> UIButton {
        let button = UIButton(type: .system)
        button.setImage(UIImage(named: "google"), for: .normal)
        button.imageView?.contentMode = .scaleAspectFit
        button.translatesAutoresizingMaskIntoConstraints = false
        button.heightAnchor.constraint(equalToConstant: 50).isActive = true
        button.widthAnchor.constraint(equalToConstant: 200).isActive = true
        return button
    }
}

When I render it, the sign in with google button looks blue. See attached. Does anyone know what I'm doing wrong?

It should say "Continue with Google"

I'm going to guess your google.png image looks something like this:

In your createGoogleSignInButton() func, you have:

let button = UIButton(type: .system)

The .system button type uses a default .tintColor of blue, which changes any non-transparent portion of the image to that tint color... and you end up with a solid blue button.

Change that line to:

let button = UIButton()

and you should get this: