android - How to change Snackbar color

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/rl"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity"
    >
    <Button
        android:id="@+id/btn_show"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Show Snackbar"
        android:layout_centerInParent="true"
        />
</RelativeLayout>

MainActivity.java

package com.cfsuman.me.androidcodesnippets;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private Context mContext;
    private Activity mActivity;

    private RelativeLayout mRelativeLayout;
    private Button mButtonShow;


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

        // Get the application context
        mContext = getApplicationContext();
        mActivity = MainActivity.this;

        // Get the widget reference from XML layout
        mRelativeLayout = (RelativeLayout) findViewById(R.id.rl);
        mButtonShow = (Button) findViewById(R.id.btn_show);

        // Set a click listener for show button
        mButtonShow.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // Initialize a new Snackbar
                Snackbar snackbar = Snackbar.make(mRelativeLayout,"Test Snackbar",Snackbar.LENGTH_LONG);

                // Display an action button in Snackbar
                snackbar.setAction("CONFIRM", new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        // Do something
                    }
                });

                // Set the Snackbar action button default text color
                snackbar.setActionTextColor(Color.parseColor("#FF378F44"));

                // Change the Snackbar default text color
                View snackbarView = snackbar.getView();
                TextView tv = (TextView) snackbarView.findViewById(android.support.design.R.id.snackbar_text);
                tv.setTextColor(Color.RED);

                // Change the Snackbar default background color
                snackbarView.setBackgroundColor(Color.parseColor("#FFB0D9B9"));

                // Display the Snackbar
                snackbar.show();
            }
        });
    }
}