<item name="android:background">@color/something</item>
    <item name="android:backgroundStacked">@color/something</item>
    <item name="android:backgroundSplit">@color/something</item>

ActionBar bar = getActionBar();
 bar.setBackgroundDrawable(new ColorDrawable("COLOR"));

<style name="Widget.ActionMode">
<item name="android:background">?android:attr/actionModeBackground</item>
<item name="android:backgroundSplit">?android:attr/actionModeSplitBackground</item>
<item name="android:height">?android:attr/actionBarSize</item>
<item name="android:titleTextStyle">@android:style/TextAppearance.Widget.ActionMode.Title</item>
<item name="android:subtitleTextStyle">@android:style/TextAppearance.Widget.ActionMode.Subtitle</item>
</style>

<style name="MyTheme.ActionMode" parent="@android:style/Theme.Holo.Light">
    <item name="android:actionModeBackground">#FFFFFF</item>
</style>

<style name="AppTheme" parent="AppBaseTheme">
    <item name="android:actionModeStyle">@style/MyTheme.ActionMode</item>
</style>

ActionBar abar = getActionBar();
abar.setBackgroundDrawable(new ColorDrawable(0xff123456));

getSupportActionBar().setBackgroundDrawable(new ColorDrawable(0xff123456));

<item name="android:actionModeBackground">@drawable/actionbar_background</item>
 <item name="actionModeBackground">@drawable/actionbar_background</item>

<style name="Widget.ActionMode">
<item name="android:background">?android:attr/actionModeBackground</item>
<item name="android:backgroundSplit">?android:attr/actionModeSplitBackground</item>
<item name="android:height">?android:attr/actionBarSize</item>
<item name="android:titleTextStyle">@android:style/TextAppearance.Widget.ActionMode.Title</item>
<item name="android:subtitleTextStyle">@android:style/TextAppearance.Widget.ActionMode.Subtitle</item>
</style>

<style name="Base.Widget.AppCompat.ActionMode" parent="">
    <item name="background">?attr/actionModeBackground</item>
    <item name="backgroundSplit">?attr/actionModeSplitBackground</item>
    <item name="height">?attr/actionBarSize</item>
    <item name="titleTextStyle">@style/TextAppearance.AppCompat.Widget.ActionMode.Title</item>
    <item name="subtitleTextStyle">@style/TextAppearance.AppCompat.Widget.ActionMode.Subtitle</item>
    <item name="closeItemLayout">@layout/abc_action_mode_close_item_material</item>
</style>

<style name="LywActionMode" parent="Base.Widget.AppCompat.ActionMode">
    <item name="background">@color/lyw_primary_color</item>
    <item name="backgroundSplit">@color/lyw_primary_color</item>
</style>

<style name="LywCompatTheme" parent="@style/Theme.AppCompat.Light">
    ...
    <item name="actionModeStyle">@style/LywActionMode</item>
</style>

<?xml version="1.0" encoding="utf-8"?>
  <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle" >

   <gradient
      android:angle="270"
      android:startColor="@android:color/holo_orange_light"
      android:centerColor="@android:color/holo_orange_dark"
      android:endColor="@android:color/holo_orange_light" />

   <size android:height="3dp" />

 </shape>

<style name="customActionModeTheme" parent="@android:style/Theme.Holo.Light">
    <item name="android:actionModeBackground">@drawable/storage_list_header_shape</item>
</style>

<activity
     android:name="com.javacafe.activities.Main"
     android:launchMode="singleTop"
     android:screenOrientation="sensorLandscape"
     android:theme="@style/customActionModeTheme" >
</activity>

app:popupTheme="@style/Theme.ToolBar"
android:popupTheme="@style/Theme.ToolBar"

app:theme="@style/Theme.ToolBar"

final ViewGroup  decorView = (ViewGroup) getActivity().getWindow().getDecorView();

@Override
public boolean onPrepareActionMode(ActionMode actionMode, Menu menu)
{

     decorView.postDelayed(new Runnable() {

     @Override
     public void run()
     {
        int buttonId = getResources().getIdentifier("action_mode_close_button", "id", "android");

        View v = decorView.findViewById(buttonId);
        if (v == null)
        {
           buttonId = R.id.action_mode_close_button;
            v = decorView.findViewById(buttonId);
        }

        if (v != null)
        {
           ((View)v.getParent()).setBackgroundColor(Color.red /*your color here*/);
        }
     }
     }, 500);}