Attribute error I don't know the reason for red letters, please let me know.

<?xml version="1.0" encoding="utf=8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#A1A9BA"
    android: orientation="vertical">

    <TextView
        android: id="@+id/tvLabelInput"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="5dp"
        android:background="#ffffff"
        android:text="@string/tv_msg"
        android:textSize="25sp"/>
</LinearLayou>