Color not changing...

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //assign views from layout file to corresponding variables
    mQuoteTestView = (TextView) findViewById(R.id.quotetextView);
    mshowquoteButton = (Button) findViewById(R.id.showquotebutton);
    mRelativeLayout = (RelativeLayout) findViewById(R.id.relativelayout);

    View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String quote = mQuoteBook.getFact();
            //update the screen with a dynamic quote
        mQuoteTestView.setText(quote);
            //this is meant to change the color on click, but it does not...not sure why...
        RelativeLayout.setBackgroundColor(Color.RED);
        }
    };



    mshowquoteButton.setOnClickListener(listener);
}

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Quote of the Day"
    android:textSize="20sp"
    android:textColor="@android:color/background_light" />

<TextView
    android:text="Loyalty and devotion lead to bravery. Bravery leads to the spirit of self-sacrifice. The spirit of self-sacrifice creates trust in the power of love. "
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/quotetextView"
    android:layout_centerVertical="true"
    android:layout_toRightOf="@+id/FactTextView"
    android:layout_toEndOf="@+id/FactTextView"
    android:fontFamily="sans-serif-condensed"
    android:textSize="24sp"
    android:textColor="@android:color/background_light" />

<Button
    android:text="Enlighten me"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/showquotebutton"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true" />