Many objects with same material how to update only one object?

I have multiple objects with the same material applied, but i want to change the colour of just one object and not all of them by changing the material colour, how can i do this without having to make a new material for every single object to individualise them ?

 

If you have a reference to the Renderer ( meshRenderer ) for the object then you can simply use renderer.material.color as behind the scenes Unity will create a clone of the material prior to changing the property.

Normally this catches developers out as they actually don't want a clone to be created in which case you should use renderer.sharedMaterial.color.

Alternatively you can make use of MaterialPropertyBlock.