SwiftUI Change Form Background

Question

I currently have the following Code:

import SwiftUI

struct TestView: View {
    
    @State var selectedDate = Date()
    @State var Placeholder = ""
    @State var isButtonPressed: Bool = false
    var body: some View {
        Form {
            
            DatePicker(selection: $selectedDate) {
                Text("Date")
            }
            
            TextField("Enter Text", text: $Placeholder)
            
            Section {
                HStack {
                    Spacer()
                
                    Button(action: {
                        self.isButtonPressed.toggle()
                    }) {
                        Text("Save")
                    }
                    
                    Spacer()
                }
            }
        }.background(Color.red)
    }
}

struct TestView_Previews: PreviewProvider {
    static var previews: some View {
        TestView()
    }
}

Which gives me this:

Normal Form

However I want to change the background of the Fields inside the Form.

I tried to use

.background(Color.red)

But it didn't change the background.

I could create a ScrollView with a VStack and then add some .clip modifiers together with a ZStack, but this is not a nice and clean solution.

So does anyone know how to only change the Background of the Fields in the Form?