While using a custom header with react navigation for a react native app, I can't identify where this background is coming from? I am using the default stack from react navigation, and in my navigator screen options I have my own custom header header: (props) => . In my screen, I have a background colour, and in my SafeAreaView I have a background colour. For illustration I have set them both to the same. In my custom header I am applying margin of 15 horizontally as well as to the top. So it is the colour underneath the custom header. My question is this: Where is this header background colour being set? (the light...