navigationBarStyle= {{ backgroundColor: '#1a8cff' }} is not changing the background

[sgmishra]

`<NavigationBar
componentCenter = { () => }
componentRight = { () => }
statusBarStyle = {{ barStyle: 'light-content', backgroundColor: '#0080ff' }}
navigationBarStyle= {{ backgroundColor: '#1a8cff' }}

        />`

the last line is not changing the backgroud color