SwiftUI -如何模糊视图的默认背景颜色？

import SwiftUI
import Combine

struct BlurredBackgroundView: View {
    var body: some View {
        ZStack {
            // 创建一个模糊效果
            VisualEffectView(effect: UIBlurEffect(style: .systemMaterial))
                .edgesIgnoringSafeArea(.all)
            
            // 你的内容视图
            VStack {
                Text("Hello, Blurred Background!")
                    .font(.largeTitle)
                    .foregroundColor(.white)
                Spacer()
            }
        }
    }
}

struct VisualEffectView: UIViewRepresentable {
    var effect: UIVisualEffect?

    func makeUIView(context: UIViewRepresentableContext<VisualEffectView>) -> UIVisualEffectView {
        let view = UIVisualEffectView(effect: effect)
        return view
    }

    func updateUIView(_ uiView: UIVisualEffectView, context: UIViewRepresentableContext<VisualEffectView>) {
        uiView.effect = effect
    }
}

struct ContentView: View {
    var body: some View {
        BlurredBackgroundView()
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}