For a finish this consistent it will need to be done when pouring the slab. It is then covered during construction so that it stays pristine. Then it will get a polish once walls are up and paint is on. It is natural concrete color, there is no stain applied.

Thank you very much for your response. is there anyway i can find out thr product and colour used?

The best thing to do would be to show this to your contractor or flooring installer and ask how best to replicate it. The product is just poured concrete with no additional pigments.