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Android Build a Simple Android App (2014) Creating the Screen Layout Setting Colors

Challenge Malfunction

This #fff092b0 is not a valid Hex color value on any planet (I think). However, when I correctly enter the answer into the challenge question, I receive an error. Believing that this is a technical issue, I thought to point it out...but I could be wrong.

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="@android:color/#fff092b0" >

  <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="@android:color/white" 
    android:textSize="72sp" />

</RelativeLayout>

Sorry...my question makes no sense~