struct ContentView: View {
   @State private var colorActive: Bool = false

   var body: some View {
      VStack(spacing: 10) {
         Text("Default Title")
            .padding()
            .background(colorActive ? Color.green : Color.clear)
         Button("Change Color") {
            changeColor()
         }
         Spacer()
      }.padding()
   }
   func changeColor() {
      colorActive.toggle()
   }
}