How to fix Toolbar Background color?

[lakshyapunhani]

<android.support.design.widget.AppBarLayout android:id="@+id/appbar" android:layout_width="match_parent" android:layout_height="300dp" android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" android:fitsSystemWindows="true"

<net.opacapp.multilinecollapsingtoolbar.CollapsingToolbarLayout android:layout_width="match_parent" android:layout_height="match_parent" app:layout_scrollFlags="scroll|exitUntilCollapsed" app:maxLines="3"> <ImageView android:contentDescription="@string/poster_image_desc" android:id="@+id/backdrop_image" android:layout_width="match_parent" android:layout_height="match_parent" android:scaleType="centerCrop" android:fitsSystemWindows="true" app:layout_collapseMode="parallax" /> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:contentInsetStart="0dp" app:popupTheme="@style/ThemeOverlay.AppCompat.Light" app:layout_collapseMode="pin"

</android.support.v7.widget.Toolbar> </net.opacapp.multilinecollapsingtoolbar.CollapsingToolbarLayout> </android.support.design.widget.AppBarLayout>

Using it like this and it is resulting in the image part as the background of Toolbar. How to set a specific background for toolbar