Scoring system help

I want to create a scoring system so that every time a set color collides with another set color you get one point and the colorObject is destroyed i.e blue ball and a blue wall however I created the scripts for gameobject(destroy) for each color in 4 different scripts so I was wondering if it is possible that if a blue ball collides with a blue wall in the if statement I could write successfulCollision; and then in my score script I could use some kind of code to add a point for every successfulCollision;

So right now it looks like your script detects when the correctly coloured ball hits the correctly coloured wall, so then you just need a script to keep track of the score, with a method that can be called to increase it. Something like:

using UnityEngine;
using System.Collections;

public class ScoreKeeper :  MonoBehaviour
{
    public int score;

    void Start()
    {
        score = 0;
    }

    public void IncreaseScore()
    {
        score++;
    }
}

Attach this to a score-keeping GameObject and create references to the script in each of your collision scripts. Then you can do this:

 void OnCollisionEnter2D(Collision2D collision2D)
 {
     if (collision2D.transform.name == "RedWall")
     {
         PlaySound(0);
         Destroy(gameObject);
         scoreKeeper.IncreaseScore();
     }
          //...
 }

Hope this helps.