Change color of Navigation Drawer Icon in Android Studio default template

Based on @MD’s comment, all I needed to do was add:

app:itemIconTint="@color/my_desired_colour"

to NavigationView (it is located in activity_main.xml layout file) The default tint is black but you can use an even darker shade of black by using #000000

 <android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_main"
    app:itemIconTint="#000000"
    app:menu="@menu/activity_main_drawer" />