Hello Wendy. Thanks for the question. The floor was left natural...it does not have a stain or color added. To create a deeper gray color, I had the concrete contractor 'burn' the floor with his finishing machine. This process creates deeper gray and charcoal colors. The floor finishing contractor polished the floor with very fine grits to allow the concrete cream to stay on the surface (client did not want aggerate showing). We refer to this finish as burnishing the floor. The floor finisher used Prosoco Consoliddeck LS densifier and Ameripoilsh stain protector. Please let me know if you have any other questions. Best, Andy