I\'m trying to build a renderer for Xamarin Forms. The renderer needs to set the EditText underline color to \"Active Color\" when selected and \"Hint Color\" when
EditText
Why don't you change the tint colour at runtime using this (May be in your text changed event):
ViewCompat.SetBackgroundTintList(_YourView , ColorStateList.ValueOf(Color.ParseColor(Resources.GetString(Resource.Color.blueLine))));
Anyways Goodluck!