MenuButton Title Dimmed Out

I have two MenuButtons, equivalent to NSPopupButtons in Cocoa. One has a list of years, starting at 2020, and the other lists calendar months. So I have the following test code to see how the MenuButton button works.

Code Block 
import SwiftUI
struct ContentView: View {
    @State var yearSelection = 2020
    @State var monthSelection = 12
    @State var monthLiteral = "December"
    
    var body: some View {
        ZStack {
            VStack {
                Spacer()
                    .frame(height: 8)
                HStack {
                    Spacer()
                        .frame(width: 16)
                    MenuButton(String(yearSelection)) {
                        ForEach((2020...2030), id: \.self) {
                            year in
                            Button(String(year)) {
                                yearSelection = year
                            }
                        }
                    }.frame(width: 68.0)
                    
                    MenuButton(monthLiteral) {
                        ForEach((1...12), id: \.self) {
                            month in
                            let monStr = Calendar.current.monthSymbols[month - 1]
                            Button(monStr) {
                                monthSelection = month
                                monthLiteral = monStr
                            }
                        }
                    }.frame(width: 102.0)
                    Spacer()
                }
                Spacer()
                Button("Select me") {
                    yearSelection = 2024
                }
            }
        }.frame(minWidth: 370, idealWidth: 370, maxWidth: 370, minHeight: 200, idealHeight: 200, maxHeight: 200, alignment: .center)
    }
}

Initially being black, if I use the year menu button to select a year, its title color will turn light gray. If I touch the menu button with the mouse pointer, the title color will turn back black. If I click on the select me push button at the bottom to select a year, again, the title color will turn light gray. Is that how the menu button works? It's kind of a cheap Dutch doll. (No offense to Dutch people...). I think this stack overflow topic is what I'm talking about. Or am I doing something wrong? Thank you.