Change App Colors of top Icons

1. All styles are in dynamicStyles at the end of App.js, however some items from header don't have styles, then you need to create new style, for example:

    myStyle: {
        color: red,
    },

and apply it where needed, for example:

<Button transparent>
    <Icon style={styles.myStyle} name='search' onPress={o.onSearchMenu} />
</Button>

 2. It's some sort of bug I think in the theme library which we're using for UNA mobile app, but you can try to play with this code (particularly with setBarStyle), by removing functionality for dark//light mode support and make it static, so it should work then:

        const isDarkMode = useDarkMode();
        var sBarStyle = 'dark-content';
        if (Platform.OS === 'android' || isDarkMode)
            sBarStyle = 'light-content';            
        if (Platform.OS === 'android')
            StatusBar.setBackgroundColor('#076fd3');
        StatusBar.setBarStyle(sBarStyle, false);         

#mobileapps

3. Alexey could you please assist with this point ?

Hello!

About item 3: It depends on where you would like to change the styles. By default there are default UNA fonts and if you change base UNA fonts, then they will changed in Messenger also. Otherwise you may use FireBug in browser to detect the class name and where it is located like on image below.