They do not work together IMO. Why not choose a plain porcelain tile in 12 x 24 maybe in a gray , your pics of the granite look quite different so what you need is to find a color in the granite and choose the flooring from that and please go larger format tile not 12 x 12 As for backsplash keep it simple with glass subway tile with matching grout and again choose a color from the granite .To me the granite and the cabinets don’t go together so now you will have to make all the choices work together.