Color Doesn't Change When giving it random value?

  public class SpawnManager : MonoBehaviour
          {
              [SerializeField] private GameObject[] Platforms, SafePlatforms,  DangerPlatforms;
              [SerializeField] private GameObject MainTower;
          
              private MeshRenderer SP_Meshrederer, DP_Meshrederer;
              void Start()
              {
                   //For Spawning
                  /*for (int YPos = 84; YPos > -84; YPos = YPos - 4)
                  {
                      if (YPos % 4 == 0)
                      {
                          int RandomInstantiation = Random.Range(0, 4);
                          Vector3 SpawnPosition = new Vector3(0, YPos, 0), Scale = new Vector3(1, 0.1428571f, 1);
                          GameObject platform = Instantiate(Platforms[RandomInstantiation], 
                                       SpawnPosition, Quaternion.identity);
                          platform.transform.parent = MainTower.transform;
                          platform.transform.localScale = Scale;
                      }
                  }*/
          
                  SafePlatforms = GameObject.FindGameObjectsWithTag("SafePlatform");
                  DangerPlatforms = GameObject.FindGameObjectsWithTag("DangerPlatform");
          
                  Color SP_Color = new Color(Random.Range(0, 256), Random.Range(0, 256), Random.Range(0, 256)),
                        DP_Color = new Color(Random.Range(0, 256), Random.Range(0, 256), Random.Range(0, 256));
          
                  foreach (GameObject platform in SafePlatforms)
                  {
                      platform.GetComponent<Renderer>().material.color = SP_Color;
                  }
          
                  foreach (GameObject platform in DangerPlatforms)
                  {
                      platform.GetComponent<Renderer>().material.color = DP_Color;
                      //DP_Meshrederer.material.color = DP_Color;
                  }
              }
          }

Hi guys i am a beginner and i was stuck here that when i give my material.color a random value through script, the color does not change but when I go to unity inspector open the materials color tab the cursor is on the random color but the material is white and when i write material.color = Color.Red than it works and the object color is changed to red ?? Any help is appriciated!

[1]: /storage/temp/172749-screenshot-2020-12-18-111854.png