Android Build a Simple Android App with Java Creating the Screen Layout Setting Colors

it is not work

android:background="#EE020213" tools:context=".MainActivity">

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentStart="true"
    android:layout_alignParentTop="true"
    android:text="Hello World!"
    android:textColor="#FAF6F6"
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#EE020213"
  android:background="@android:color/white" >

  <TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:text="Treehouse loves me!"
    android:textColor="#FAF6F6"
    android:textSize="72sp" />

</RelativeLayout>