NavigationBar Color / Swift - ios

Question

I created the NavigationBar, but when I perform .inline, I cannot make the background color completely black.
Do you have any information on this?
I could not find how to do it.
I would be glad if you could fix this.
likewise tabBar also have this color problem
I tried different ways but got the same result in all of them.
init() {
//Tabbar Renk bölümü
UITabBar.appearance().barTintColor = UIColor.black
UINavigationBar.appearance().barTintColor = .black
}
HStack(spacing: 10) {
NavigationLink(destination: PicturePage()) {
Text("Picture")
.font(.title)
.foregroundColor(Color(#colorLiteral(red: 0.7239437103, green: 0.2440972626, blue: 0.4727140069, alpha: 1)))
.frame(maxWidth: geometry.size.width)
.frame(height: geometry.size.height / 5)
.overlay(
RoundedRectangle(cornerRadius: 10)
.stroke(Color(#colorLiteral(red: 0.8527825475, green: 0.821311295, blue: 0.8959596753, alpha: 1)), lineWidth: 3)
)
}.navigationBarTitle(Text("Geri"),displayMode: .inline)
.navigationBarHidden(true)
}
struct PicturePage: View {
//3-1//
var body: some View {
GeometryReader { geometry in
Color.black.edgesIgnoringSafeArea(.all)
VStack {
VStack {
Text("Picture")
.font(.system(size: 60))
.frame(height: geometry.size.height / 10)
.foregroundColor(.init(red: 45 / 255, green: 0 / 255, blue: 112 / 255))
Spacer().frame(height: geometry.size.height / 15)
}
VStack {
Text("Merhaba").frame(width: geometry.size.width, height: geometry.size.height / 10)
.foregroundColor(Color.white)
}
VStack {
Image("AstroGirl").resizable()
.aspectRatio(contentMode: .fit)
.frame(width: geometry.size.width, height: geometry.size.height / 3)
Spacer().frame(height: geometry.size.height / 15)
}
// This `HStack` is changed
HStack(spacing: 30) {
ForEach(0 ..< 3) { _ in
CircleView()
.frame(width: geometry.size.width / 5, height: geometry.size.height / 10)
.shadow(color: Color.yellow, radius: 10, x: 0, y: 0)
}
}
Spacer().frame(height: geometry.size.height / 10)
VStack {
Button(action: {}, label: {
Text("Gönder")
.frame(width: geometry.size.width / 3, height: 50)
.padding(10)
.font(Font.system(size: 30, weight: .medium, design: .serif))
.foregroundColor(.white)
.background(RoundedRectangle(cornerRadius: 30))
.foregroundColor(.init(red: 45 / 255, green: 0 / 255, blue: 112 / 255))
})
}
}
}
}
}