Overlay a color over SwiftUI view?

For my SwiftUI notes app, I would like to overlay a color over the entire view, but I've only been able to cover half off the screen with the color. Other attempts at setting the color and an overlay has only resulted in errors so far. Is there a solution to this? Or should go about this another way? Image has been provided as well. 1

import SwiftUI

let dateFormatter2 = DateFormatter()

struct NoteItem2: Codable, Hashable, Identifiable {
    let id: Int
    let text: String
    var date = Date()
    var dateText: String {
        dateFormatter.dateFormat = "h:mm a"
        return dateFormatter.string(from: date)
    }
}

struct green_screen : View {
    @State var items: [NoteItem] = {
        guard let data = UserDefaults.standard.data(forKey: "notes") else { return [] }
        if let json = try? JSONDecoder().decode([NoteItem].self, from: data) {
            return json
        }
        return []
    }()
    
    @State var taskText: String = ""
    
    @State var showAlert = false
    
    @State var itemToDelete: NoteItem?
    
    var alert: Alert {
        Alert(title: Text("Hey!"),
              message: Text("Are you sure you want to delete this item?"),
              primaryButton: .destructive(Text("Delete"), action: deleteNote),
              secondaryButton: .cancel())
    }
    
    var inputView: some View {
        Color.green
            .overlay(
        HStack {
            TextField("Write a note for yourself...", text: $taskText)
                .padding(EdgeInsets(top: 0, leading: 16, bottom: 0, trailing: 16))
                .clipped()
            Button(action: didTapAddTask, label: { Text("Add") }).padding(8)
        })
            .edgesIgnoringSafeArea(.all)
    }
    
    var body: some View {
        VStack {
            inputView
            Divider()
            List(items) { item in
                VStack(alignment: .leading) {
                    Text(item.dateText).font(.headline)
                    Text(item.text).lineLimit(nil).multilineTextAlignment(.leading)
                }
                .onLongPressGesture {
                    self.itemToDelete = item
                    self.showAlert = true
                }
            }
            .alert(isPresented: $showAlert, content: {
                alert
            })
        }
    }
    
    func didTapAddTask() {
        let id = items.reduce(0) { max($0, $1.id) } + 1
        items.insert(NoteItem(id: id, text: taskText), at: 0)
        taskText = ""
        save()
    }
    
    func deleteNote() {
        guard let itemToDelete = itemToDelete else { return }
        items = items.filter { $0 != itemToDelete }
        save()
    }
    
    func save() {
        guard let data = try? JSONEncoder().encode(items) else { return }
        UserDefaults.standard.set(data, forKey: "notes")
    }
}

struct green_screen_Previews: PreviewProvider {
    static var previews: some View {
        green_screen()
    }
}