settings.java

<resources>
<!-- 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>
<item name="android:timePickerDialogTheme">@style/Dialog.Theme</item>
</style>
<!-- Configuration for Dialog.theme. -->
<style name="Dialog.Theme" parent="Theme.AppCompat.Light.Dialog">
<!-- BackgroundColor of the date modal -->
<item name="colorAccent">#0066F5</item>
<!-- Change textColor of the date modal -->
<item name="android:textColorPrimary">#000000</item>
</style>
</resources>