Android CardView Change Background Color

<androidx.cardview.widget.CardView
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:cardBackgroundColor="@color/colorPrimary"
        app:cardUseCompatPadding="true"
        app:cardCornerRadius="12dp">

</androidx.cardview.widget.CardView>