How to change active color of BottomNavigationView
remove or change color for active item in BottomNavigationView
You can create a style, like this:
<style name="Custom.Indicator" parent="Widget.Material3.BottomNavigationView.ActiveIndicator">
<item name="android:color">#FF00FF</item>
</style>
And then set it on you BottomNavigation, like this:
<com.google.android.material.bottomnavigation.BottomNavigationView
app:itemActiveIndicatorStyle="@style/Custom.Indicator"