How to destroy blocks that are matching in color C#

I'm currently working on a game that is similar to Pet Rescue saga and I was having trouble with figuring out how to store the color variable of the block and find colors of blocks that are the same as that color and then "destroy" that group of blocks. Hopefully someone understands what I'm attempting to ask. I'm struggling to describe what I want accurately, but I will post the code and note the lines where I am running into issues. There is prototyped code within the code at the moment, but please ignore it. In the function "public void DestroyBlocks(Vector2 pos)" I'm attempting to store the color of the block and have it find blocks that are on the top, bottom, left, or right of that block that are the same in color and when the user clicks on one of those blocks, it destroys that group. Also note that "Block.tex" is referencing another CS script. I hope this isn't too complicated/hope I explained it as much as possible so that someone is able to assist me in this. Thank you in advance for your help.

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class LuckyLandingGame : MonoBehaviour {
     [System.Serializable]
     public class Board {
         
         public GameObject[,] grid = new GameObject[10,10];
         
         public Vector2 GetBlockPos(GameObject clickedBlock) {
             for (int x = 0; x < 10; x++) {
                 for (int y = 0; y < 10; y++) {
                     if (clickedBlock.Equals(grid[x,y])){
                         Debug.LogError("Found Block at pos: " +x+ ", " +y);    
                         return new Vector2(x*1f,y*1f);
                     }
                 }
             }
         }
         
         public void DestroyBlocks(Vector2 pos) {
             //temp variable stores color
             Vector2 temp = gameBoard.grid[x,z].GetComponent<Block>().tex;
             //change color to blank color or destroy element
             
         }
         
     }
     
     //var bookNerd
     //var encyclopediaBlock
     //var keyOfKnowledge
     
     //int confettiPoints
     public Board gameBoard;
     
     public GameObject block1;
     public Texture blockTexture;
     public List<Color> texBlock = new List<Color>(3);
     public List<Block> blockTypes = new List<Block>();
     int gridWidth = 10;
     int gridHeight = 10;
     //Random rndGrid = new Random();
     
     
     // Use this for initialization
     void Start () {
         
         //randomize colors of blocks (for loop)
         //put player character at the top of stack
         //if user hovers over group of blocks, highlight group
         
         createWorld ();
         
     
     }
     
     // Update is called once per frame
     void Update () {
         
         if(Input.GetMouseButtonDown(0)) {
             Ray blockRay = Camera.main.ScreenPointToRay(Input.mousePosition);
             RaycastHit hit;
             if(Physics.Raycast(blockRay, out hit)) {
                 if (hit.transform.gameObject.GetComponents<Block>().Length>0) {
                     hit.transform.gameObject.GetComponent<Block>().ClickBlock();
                     gameBoard.GetBlockPos(hit.transform.gameObject);
                     Destroy (hit.transform.gameObject);
                 }
             }
         }
         //if user clicks on 2 or more blocks - destroy blocks
             //if 2 blocks match +4 points
             //if 3 blocks match +9 points
             //if 4 blocks match +16 points
             //if 5 blocks match +25 points
             //if 6 blocks match +36 points
             //if 7 blocks match +49 points
             //if 8 blocks match +64 points
         
         //if user clicks on "pause button" pause game
         //if user clicks on "resume button" unpause game
         
     
     }
     
     void powerUps () {
         //bookNerd powerup
             //enables player to eliminate entire HORIZONTAL row of blocks
             //+4 confetti points for every block
         
         //encylopediaBlock powerup
             //cannot move unless "unlocked"
             //if player has key of knowledge, unlock encyclopediaBlock
         
         //keyOfKnowledge powerup
             //allow player to "unlock" encyclopediaBlock
     }
     
     void createWorld () {
         
         
         //Create a grid of blocks that chooses a random number and assigns an asset to that number
         for (int x = 0; x<gridWidth; x++) {
             
             for (int z = 0; z<gridHeight; z++) {
                 
                 int chooseBlock = Random.Range(0, 3);
                 
                 gameBoard.grid[x,z] = Instantiate(block1, transform.position, transform.rotation) as GameObject;
                 gameBoard.grid[x,z].AddComponent<Block>();
                 gameBoard.grid[x,z].GetComponent<Block>().tex = texBlock[chooseBlock];
                 gameBoard.grid[x,z].transform.parent = transform;
                 gameBoard.grid[x,z].transform.localPosition = new Vector3 (x-4.5f, 1, z-4.5f);
                 gameBoard.grid[x,z].renderer.material.mainTexture = blockTexture;
                 gameBoard.grid[x,z].transform.localScale = new Vector3 (.95f, .95f, .95f);
             }
         }
     }
 }