Unable to change the color of a button on a disabled button.

Hi there. I am trying to change the color of a button that is disabled on a panel. When I click on the button to change the color, I get a null reference error. When I click on another button to enable the panel that is disabled with the button on it that is also disabled as a child, I see no change in the color settings. I have tried multiple different ways to make the color set on an image of a button on a disabled button.

These are my two methods I currently have that are not functioning correctly

Method (1). Making the gameobject locate the script and set its values

 public void ColorToSetBtnPressed2()
     {
         if (selbtn2.activeSelf) {
             CurCol2.GetComponent<ColorSet2>().CurCol2.GetComponent<Image>().color = ColorToSet2;
         }
     }

Method (2): Adding in a Resources.FindObjectsOfTypeAll function to force the button to show the changes to the image color.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
 
 public class FindAllGameObjects : MonoBehaviour {
 
     // this script locates all the gameobjects in the current scene
 
     public static List<GameObject> FindAllObjectsInScene()
     {
         UnityEngine.SceneManagement.Scene activeScene = UnityEngine.SceneManagement.SceneManager.GetActiveScene ();
 
         GameObject[] rootObjects = activeScene.GetRootGameObjects ();
 
         GameObject[] allObjects = Resources.FindObjectsOfTypeAll<GameObject> ();
 
         List<GameObject> objectsInScene = new List<GameObject> ();
 
         for (int i = 0; i < rootObjects.Length; i++) {
             objectsInScene.Add (rootObjects [i]);
         }
             for (int i = 0; i < allObjects.Length; i++)
             {
                 if (allObjects[i].transform.root)
                 {
                     for (int i2 = 0; i2 <rootObjects.Length; i2++)
                     {
                         if (allObjects[i].transform.root == rootObjects[i2].transform && allObjects[i] != rootObjects[i2])
                         {
                             objectsInScene.Add (allObjects [i]);
                             break;
                         }
                     }
                 }
             }
         return objectsInScene;
     }
 }

Any help would be very helpful.