why

Assets/Canvas_Library.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
+using TMPro;
 
 public class Canvas_Library : MonoBehaviour
 {
@@ -31,6 +32,7 @@ public class Canvas_Library : MonoBehaviour
         {
             var index = i;
             libraryTabs[i].onValueChanged.AddListener(isOn => OnActiveTabChange(index, isOn));
+            libraryTabs[i].onValueChanged.AddListener(isOn => libraryTabs[index].GetComponent<LibraryToggle>().OnToggle(isOn));
         }
     }
 

Assets/Resources/UI/Image/Library_Toggle/Frame 20 (1).png.meta

@@ -6,7 +6,7 @@ TextureImporter:
   serializedVersion: 13
   mipmaps:
     mipMapMode: 0
-    enableMipMap: 1
+    enableMipMap: 0
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     linearTexture: 0
     fadeOut: 0
@@ -37,13 +37,13 @@ TextureImporter:
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@@ -52,9 +52,9 @@ TextureImporter:
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@@ -113,7 +113,7 @@ TextureImporter:
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Assets/Resources/UI/Image/Library_Toggle/Frame 20 (2).png.meta

@@ -0,0 +1,130 @@
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Assets/WorkSpace/LH/LibraryToggle.cs

@@ -0,0 +1,23 @@
+using UnityEngine;
+using TMPro;
+
+public class LibraryToggle : MonoBehaviour
+{
+    TMP_Text Label;
+    private void Awake()
+    {
+        Label = transform.Find(nameof(Label)).GetComponent<TMP_Text>();
+    }
+
+    public void OnToggle(bool flag)
+    {
+        if (flag)
+        {
+            Label.color = new Color(1, 1, 1);
+        }
+        else
+        {
+            Label.color = new Color(0, 0, 0);
+        }
+    }
+}

Assets/WorkSpace/LH/LibraryToggle.cs.meta

@@ -0,0 +1,2 @@
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