public void onBindViewHolder(InstalledFontViewRecyclerAdapter.ViewHolder holder, int position) {

    if (//Some Condition) {
        holder.itemView.setBackgroundColor(Color.GREY);
    }
    else {
        holder.itemView.setBackgroundColor(Color.RED);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_height="match_parent"
    >
    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:id="@+id/installed_recyclerView"
        android:paddingTop="1dp"
        ></android.support.v7.widget.RecyclerView>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:elevation="3dp"
    android:paddingBottom="1dp"
    android:clickable="true"
    android:focusable="true"
    android:focusableInTouchMode="true"

    >

    <android.support.v7.widget.CardView
        xmlns:card_view="http://schemas.android.com/apk/res-auto"
        android:id="@+id/post_card_view"
        android:layout_gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        card_view:cardCornerRadius="1dp"
        >

                 //Many things here like buttons etx

    </android.support.v7.widget.CardView>
</LinearLayout>