the button uses the accent color, so the progress should use the primary
android:layout_height="80dp"
android:layout_margin="4dp"
android:indeterminate="true"
android:layout_height="80dp"
android:layout_margin="4dp"
android:indeterminate="true"
+ android:indeterminateTint="@color/colorPrimary"
android:visibility="invisible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
android:visibility="invisible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />