Change color of augmented object (AR core + unity) at runtime

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Augmented-Reality

Unity

material

I am using the Image Target Detection example from AR Core SDK. I want to change the color of the object at runtime through script. A material is attached to that object.

// Create an anchor to ensure that ARCore keeps tracking this augmented image.
      Anchor anchor = image.CreateAnchor(image.CenterPose);
      visualizer = (AugmentedImageVisualizer)Instantiate(
      AugmentedImageVisualizerPrefab, anchor.transform);
      visualizer.Image = image;
      m_Visualizers.Add(image.DatabaseIndex, visualizer);


      Renderer rend = visualizer.GetComponent<Renderer>();
      rend.sharedMaterial.shader = Shader.Find("BaseColor");
      Color red = new Color(255,0,0);
      rend.sharedMaterial.SetColor("_Color", red);

This is my current code which I have tried to implement after taking hint from different answers but nothing seems to work.

What I have tried:

Renderer rend = visualizer.GetComponent<Renderer>();
rend.sharedMaterial.shader = Shader.Find("BaseColor");
Color red = new Color(255,0,0);
rend.sharedMaterial.SetColor("_Color", red);