How to change color of entity without change materials?

Unity Engine
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1

I use unity 2019.2b with LWRP

In LWRP, change color of gameobject is gameObject.GetComponent<MeshRenderer>().material.SetColor("_BaseColor", color);

after that i convert to entity via GameObjectConversionUtility

Entity entity =  GameObjectConversionUtility.ConvertGameObjectHierarchy(instance.gameObject, World.Active);
entityManager.SetName(entity, instance.name);
Destroy(instance.gameObject);
entityList.Add(entity);

Here is my question.

how can change color after converted to entity already.

2

Is rather 1 year old and I am not sure how relevant may be, but here it is