React Native, change React Navigation header styling

In newer versions of React Navigation you have a flatter settings object, like below:

static navigationOptions = {
  title: 'Chat',
  headerStyle: { backgroundColor: 'red' },
  headerTitleStyle: { color: 'green' },
}

Deprecated answer:

Per the docs, here, you modify the navigationOptions object. Try something like:

static navigationOptions = {
    title: 'Welcome',
    header: {
        style: {{ backgroundColor: 'red' }},
        titleStyle: {{ color: 'green' }},
    }
}

Please don't actually end up using those colors though!

Try this working code

static navigationOptions = {
      title: 'Home',
      headerTintColor: '#ffffff',
      headerStyle: {
        backgroundColor: '#2F95D6',
        borderBottomColor: '#ffffff',
        borderBottomWidth: 3,
      },
      headerTitleStyle: {
        fontSize: 18,
      },
  };

Notice! navigationOptions is differences between Stack Navigation and Drawer Navigation
Stack Navigation Solved.
But for Drawer Navigation you Can add Your own Header and Make Your Styles with contentComponent Config:
First import { DrawerItems, DrawerNavigation } from 'react-navigation' Then

Header Before DrawerItems:

contentComponent: props => <ScrollView><Text>Your Own Header Area Before</Text><DrawerItems {...props} /></ScrollView> .

Footer After DrawerItems:

contentComponent: props => <ScrollView><DrawerItems {...props} /><Text>Your Own Footer Area After</Text></ScrollView> .

According to documentation you can use "navigationOptions" style like this.

static navigationOptions = {
  title: 'Chat',
  headerStyle:{ backgroundColor: '#FFF'},
  headerTitleStyle:{ color: 'green'},
}

For more info about navigationOptions you can also read from docs:-

https://reactnavigation.org/docs/navigators/stack#Screen-Navigation-Options