<item name="android:colorButtonNormal">@color/blue</item>

<Button
   android:id="@+id/button1"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:elevation="3dp"
   android:backgroundTint="@color/orange"
   android:text="@string/button1_text"
   android:textAllCaps="true"
   android:textColor="@color/white"
   android:textSize="18sp" />

<style name="AppTheme" parent="@android:style/Theme.Material.Light">
    <item name="android:actionBarStyle">@style/actionBarCustomization</item>
    <item name="android:spinnerDropDownItemStyle">@style/mySpinnerDropDownItemStyle</item>
    <item name="android:spinnerItemStyle">@style/mySpinnerItemStyle</item>
    <item name="android:colorButtonNormal">@color/myDarkBlue</item>
</style>

<style name="actionBarCustomization" parent="@android:style/Widget.Material.Light.ActionBar">
    <item name="android:background">@color/white</item>
    <item name="android:titleTextStyle">@style/actionBarTextColor</item>
</style>

<style name="actionBarTextColor" parent="@android:style/TextAppearance">
    <item name="android:textColor">@color/black</item>
</style>