You can add <item name="android:datePickerDialogTheme">@style/Dialog.Theme</item>
    
    in your style.xml under Base theme like bellow
 
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="android:textColor">#000000</item>
        <item name="android:datePickerDialogTheme">@style/Dialog.Theme</item>
    </style>
    
    
    and you add new style like below
   
<!-- Configuration for Dialog.theme. -->
<style name="Dialog.Theme" parent="Theme.AppCompat.Light.Dialog">
  <!-- BackgroundColor of the date modal -->
    <item name="colorAccent">#0066F5</item>
    <!-- textColor of the date modal -->
    <item name="android:textColorPrimary">#000000</item>
</style>

我希望这是工作