Lerping 10 collors not that smooth

the idea is that each level has it own color and that it lerps from one level to the other one.

old : my script witch lerps between 2 colors every level (for 10 levels long) but it does not change very smooth. it has to change consistently thrue out the level bet each time it changes its a quite big color difference.

new : when it lerps the color change is seamless but it does not always lerp because it does not always the exact color because of the lerping

edit: new code.

this is the script (you do need to change the colors manually so you can see the difference) using UnityEngine; using System.Collections;

 public class ColorChanger : MonoBehaviour {
     public Color ambColor1 = Color.red;
     public Color ambColor2 = Color.blue;
     public Color fogColor1 = Color.red;
     public Color fogColor2 = Color.blue;
     public float duration = 1.0F;
     public Color fogColor3 = Color.blue;
     public Color fogColor4 = Color.blue;
     public Color fogColor5 = Color.blue;
     public Color fogColor6 = Color.blue;
     public Color fogColor7 = Color.blue;
     public Color fogColor8 = Color.blue;
     public Color fogColor9 = Color.blue;
     public Color fogColor10 = Color.blue;
     public Color fogColor11 = Color.blue;
 
 
     public Color ambColor3 = Color.red;
     public Color ambColor4 = Color.blue;
     public Color ambColor5 = Color.red;
     public Color ambColor6 = Color.blue;
     public Color ambColor7 = Color.red;
     public Color ambColor8 = Color.blue;
     public Color ambColor9 = Color.red;
     public Color ambColor10 = Color.blue;
     public Color ambColor11 = Color.red;
 
 
     public int map;
 
     public bool LerpColorBool = true;
 
     public GameObject DirectionalLight;
     public GameObject levelManager;
     // Use this for initialization
     void Start () {
         StartCoroutine (colorCheck ());
     }
     
     // Update is called once per frame
     void Update () {
         Debug.Log (ambColor1);
         if (LerpColorBool == true)
         {
             LerpColor();
         }
     
 
 
     }
 
     void LerpColor()
     {
                 float t = Mathf.PingPong (Time.time, duration) / duration;
                 RenderSettings.fogColor = Color.Lerp (fogColor1, fogColor2, t);
                 RenderSettings.ambientLight = Color.Lerp (ambColor1, ambColor2, t);
                 DirectionalLight.light.color = Color.Lerp (ambColor1, ambColor2, t);
                 if (RenderSettings.fogColor == fogColor2) {
                         LerpColorBool = false;
     
                 }
         }
     IEnumerator colorCheck ()
     {
         yield return new WaitForSeconds(1f);
 
         //LevelManager LM = levelManager.GetComponent<LevelManager> ();
         if (LerpColorBool == false) {
             map ++;
                         switch (map) {
                         case 1:
                                 
                                 break;
                         case 2:
                                 fogColor2 = fogColor3;
                                 fogColor1 = fogColor2;
                                 ambColor2 = ambColor3;
                                 ambColor1 = ambColor1;
                                 break;
                         case 3:
                                 fogColor2 = fogColor3;
                                 fogColor1 = fogColor4;
                                 ambColor2 = ambColor3;
                                 ambColor1 = ambColor4;
                                 break;
                         case 4:
                                 fogColor2 = fogColor4;
                                 fogColor1 = fogColor5;
                                 ambColor2 = ambColor4;
                                 ambColor1 = ambColor5;
                                 break;
                         case 5:
                                 fogColor2 = fogColor5;
                                 fogColor1 = fogColor6;
                                 ambColor2 = ambColor5;
                                 ambColor1 = ambColor6;
                                 break;
                         case 6:
                                 fogColor2 = fogColor6;
                                 fogColor1 = fogColor7;
                                 ambColor2 = ambColor6;
                                 ambColor1 = ambColor7;
                                 break;
                         case 7:
                                 fogColor2 = fogColor7;
                                 fogColor1 = fogColor8;
                                 ambColor2 = ambColor7;
                                 ambColor1 = ambColor8;
                                 break;
                         case 8:
                                 fogColor2 = fogColor9;
                                 fogColor1 = fogColor8;
                                 ambColor2 = ambColor9;
                                 ambColor1 = ambColor8;
                                 break;
                         case 9:
                                 fogColor2 = fogColor9;
                                 fogColor1 = fogColor10;
                                 ambColor2 = ambColor9;
                                 ambColor1 = ambColor10;
                                 break;
                         case 10:
                                 fogColor2 = fogColor11;
                                 fogColor1 = fogColor10;
                                 ambColor2 = ambColor11;
                                 ambColor1 = ambColor10;
                                 break;
                     
             
                         }
             LerpColorBool = true;
         }
         StartCoroutine (colorCheck ());
     }
 
 }