Custom Button in SwiftUI List

In standard variant List intercepts and handles content area of tap detection, in your custom style it is defined, by default, by opaque area, which is only text in your case, so corrected style is

Update for: Xcode 13.3 / iOS 15.4

It looks like Apple broken something, because listRowBackground now works only inside List itself, no subview, which is senseless from generic concept of SwiftUI.

Updated solution with same behavior as on demo

Original for: Xcode 11.4 / iOS 13.4

struct BlueButtonStyle: ButtonStyle {

  func makeBody(configuration: Self.Configuration) -> some View {
    configuration.label
        .font(.headline)
        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .center)
        .contentShape(Rectangle())
        .foregroundColor(configuration.isPressed ? Color.white.opacity(0.5) : Color.white)
        .listRowBackground(configuration.isPressed ? Color.blue.opacity(0.5) : Color.blue)
  }
}

and usage, just

Button(action: {print("pressed")})
{
    Text("Save")
}.buttonStyle(BlueButtonStyle())

and even

Button("Save") { print("pressed") }
    .buttonStyle(BlueButtonStyle())