article_colors_block9.xml

<!-- res/styles.xml -->
<style name="Widget.MyApp.Button.MixedColors" parent="Widget.MaterialComponents.Button">
  <item name="android:textColor">?attr/colorPrimaryVariant</item>
  <item name="backgroundTint">?attr/colorSecondary</item>
</style>

<!-- Layout -->
<Button
  style="@style/Widget.MyApp.Button.MixedColors"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="Customized Button" />