diff --git a/Unity3D/ugui/UnityNode.cs b/Unity3D/ugui/UnityNode.cs
index c9ba1b6..810eeb8 100644
--- a/Unity3D/ugui/UnityNode.cs
+++ b/Unity3D/ugui/UnityNode.cs
@@ -464,9 +464,9 @@ private string GetImageSourceTexture()
             }
 
             Renderer render = gameObject.GetComponent<Renderer>();
-            if (renderer != null && renderer.material != null)
+            if (render != null && render.material != null && render.material.HasProperty("_Color"))
             {
-                return renderer.material.color.ToString();
+                return render.material.color.ToString();
             }
 
             return null;
diff --git a/Unity3D/uguiWithTMPro/UnityNode.cs b/Unity3D/uguiWithTMPro/UnityNode.cs
index 94b9652..07ac01e 100644
--- a/Unity3D/uguiWithTMPro/UnityNode.cs
+++ b/Unity3D/uguiWithTMPro/UnityNode.cs
@@ -464,9 +464,9 @@ private string GetImageSourceTexture()
             }
 
             Renderer render = gameObject.GetComponent<Renderer>();
-            if (renderer != null && renderer.material != null)
+            if (render != null && render.material != null && render.material.HasProperty("_Color"))
             {
-                return renderer.material.color.ToString();
+                return render.material.color.ToString();
             }
 
             return null;