CollapsingToolbarLayout arrow color
<p>I'm using CollapsingToolbarLayout in my Activity, but I need to change color of back arrow when it is expanded, is there any way to do this?
What I have:</p>

<p><a href="https://i.stack.imgur.com/ie1PP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ie1PP.png" alt="enter image description here"></a>
<a href="https://i.stack.imgur.com/Lx9X6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Lx9X6.png" alt="enter image description here"></a></p>

<p>What I want to do:</p>

<p><a href="https://i.stack.imgur.com/yOMlV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yOMlV.png" alt="enter image description here"></a>
<a href="https://i.stack.imgur.com/Lx9X6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Lx9X6.png" alt="enter image description here"></a></p>

<p>Here is my layout, where i put "..." there is layout include with NestedScrollView in it.</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.primebitstudio.swiper.AboutCouponActivity"
    android:layout_marginTop="-1px"&gt;

    &lt;android.support.design.widget.AppBarLayout android:id="@+id/app_bar"
        android:fitsSystemWindows="true"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:theme="@style/AppTheme.AppBarOverlay"&gt;

        &lt;android.support.design.widget.CollapsingToolbarLayout android:id="@+id/toolbar_layout"
            android:fitsSystemWindows="true"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleTextAppearance="@style/CollapsingToolbarLayoutExpandedTextStyle"
            app:theme="@style/ThemeOverlay.AppCompat.Light"
            app:popupTheme="@style/ToolBarStyle"&gt;

            &lt;RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="-24dp"&gt;
                &lt;ImageView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:adjustViewBounds="true"
                    android:scaleType="fitCenter"
                    android:src="@drawable/test_image"
                    android:id="@+id/image"/&gt;
            &lt;/RelativeLayout&gt;

            &lt;android.support.v7.widget.Toolbar android:id="@+id/toolbar"
                android:layout_height="?attr/actionBarSize"
                android:layout_width="match_parent"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ToolBarStyle" /&gt;

        &lt;/android.support.design.widget.CollapsingToolbarLayout&gt;
    &lt;/android.support.design.widget.AppBarLayout&gt;
...
...
&lt;/android.support.design.widget.CoordinatorLayout&gt;
</code></pre>