[Sony Cross-Device Development Themes and Apps] serajr:
Sure buddy... In my plans!!!

status_bar_recent_panel.xml

From:

<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.recent.RecentsPanelView android:id="@id/recents_root" android:layout_width="fill_parent" android:layout_height="fill_parent" android:foreground="@drawable/bg_protect" systemui:recentItemLayout="@layout/status_bar_recent_item"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui">
<FrameLayout android:id="@id/recents_bg_protect" [B][COLOR="Red"]android:background="@drawable/status_bar_recents_background"[/COLOR][/B] android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_alignParentBottom="true">
<com.android.systemui.recent.RecentsVerticalScrollView android:layout_gravity="start|bottom|center" android:id="@id/recents_container" android:scrollbars="none" android:fadingEdge="vertical" android:fadingEdgeLength="@dimen/status_bar_recents_scroll_fading_edge_length" android:clipChildren="false" android:clipToPadding="false" android:layout_width="fill_parent" android:layout_height="wrap_content" android:stackFromBottom="true" android:divider="@null" android:layout_marginEnd="0.0dip">
<LinearLayout android:orientation="vertical" android:id="@id/recents_linear_layout" android:fitsSystemWindows="true" android:clipChildren="false" android:clipToPadding="false" android:layout_width="fill_parent" android:layout_height="wrap_content" />
</com.android.systemui.recent.RecentsVerticalScrollView>
</FrameLayout>
<include android:id="@id/recents_no_apps" android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" layout="@layout/status_bar_no_recent_apps" />
</com.android.systemui.recent.RecentsPanelView>

To:

<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.recent.RecentsPanelView [B][COLOR="red"]android:background="@drawable/status_bar_recents_background"[/COLOR][/B] android:id="@id/recents_root" android:layout_width="fill_parent" android:layout_height="fill_parent" android:foreground="@drawable/bg_protect" systemui:recentItemLayout="@layout/status_bar_recent_item"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui">
<FrameLayout android:id="@id/recents_bg_protect" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_alignParentBottom="true">
<com.android.systemui.recent.RecentsVerticalScrollView android:layout_gravity="start|bottom|center" android:id="@id/recents_container" android:scrollbars="none" android:fadingEdge="vertical" android:fadingEdgeLength="@dimen/status_bar_recents_scroll_fading_edge_length" android:clipChildren="false" android:clipToPadding="false" android:layout_width="fill_parent" android:layout_height="wrap_content" android:stackFromBottom="true" android:divider="@null" android:layout_marginEnd="0.0dip">
<LinearLayout android:orientation="vertical" android:id="@id/recents_linear_layout" android:fitsSystemWindows="true" android:clipChildren="false" android:clipToPadding="false" android:layout_width="fill_parent" android:layout_height="wrap_content" />
</com.android.systemui.recent.RecentsVerticalScrollView>
</FrameLayout>
<include android:id="@id/recents_no_apps" android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" layout="@layout/status_bar_no_recent_apps" />
</com.android.systemui.recent.RecentsPanelView>

See red property movement (Z3 4.4.4 SystemUI.apk code)!

Yes... In my plans too!!!