Android Support Toolbar colorControlNormal color

Question

I would like to set my spinner drop down color to white, whilst keeping the other elements in my theme the default color. Here is the situation:

Answer 1

Finally, I have found a solution on how to change arrow color of Spinner to white.

1) In styles.xml, add the following style:

<style name="ActionBarThemeOverlay" parent="">
    <item name="android:textColorPrimary">#ffffff</item>
    <item name="colorControlNormal">#ffffff</item>
    <item name="colorControlHighlight">#ff33b5e5</item>
</style>

<style name="Widget.MyTheme.HeaderBar.Spinner" parent="Widget.AppCompat.Light.Spinner.DropDown.ActionBar">
    <item name="android:theme">@style/ActionBarThemeOverlay</item>
</style>

2) In the layout, where you use the Spinner (in your case with Toolbar), add the style to your spinner:

<Spinner
    xmlns:android="http://schemas.android.com/apk/res/android"
         android:id="@+id/my_spinner"
         style="@style/Widget.MyTheme.HeaderBar.Spinner"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" />

Answer 2

Just stumbled across this questions. Even though it has been asked some time ago I just wanted to leave an answer that should work:

Toolbar *.xml

<android.support.v7.widget.Toolbar
    <!-- leave the theme stuff out of here -->
    style="@style/MyToolbarStyle"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

Styles / Themes

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <!-- your other attributes -->
    <!-- following is used to tint the checkbox - purple for demo purpose -->
    <item name="colorControlNormal">#2196F3</item>
</style>

<style name="MyToolbarStyle">
    <item name="android:minHeight">?actionBarSize</item>
    <item name="android:background">?colorPrimary</item>
    <item name="popupTheme">@style/ThemeOverlay.AppCompat.Light</item>
    <item name="theme">@style/MyToolbarTheme</item>
</style>

<style name="MyToolbarTheme">
    <!-- Used to tint the back arrow, menu and spinner arrow -->
    <item name="colorControlNormal">#FFF</item>
</style>

Result

Note: I made the checkbox purple for demo purpose