minor changes

Assets/Scripts/BasicLightEstimationUI.cs

-using UnityEngine.UI;
+using System;
+using UnityEngine.UI;
 
 namespace UnityEngine.XR.ARFoundation.Samples
 {
         {
             SetUIValue(m_LightEstimation.brightness, ambientIntensityText);
 
-            //Display either color temperature or color correction if supported
+            //Display color temperature or color correction if supported
-            else
+            else if (m_LightEstimation.colorCorrection != null)
+            else
+                SetUIValue<float>(null, ambientColorText);
-
+        
         void SetUIValue<T>(T? displayValue, Text text) where T : struct
         {
             if (text != null)

Assets/Scripts/HDRLightEstimation.cs

             }
             else if (arrow)
             {
-                arrow?.gameObject.SetActive(false);
+                arrow.gameObject.SetActive(false);
                 mainLightDirection = null;
             }