LibreTube/app/src/main/res/drawable/ic_block.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="48"
    android:viewportHeight="48"
    android:tint="?attr/colorControlNormal">

    <path
        android:fillColor="#FF000000"
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</vector>