Hereford Grey sawn and sandblasted
If the uneven texture of the traditional flagstones is not to your liking, then the sawn edge is the antidote. It is the contemporary version. It is sawn on all 6 sides, and has a sandblasted surface to still give it grip for outside. It still consists of the same mixture of colours, but the neatness, and clean lines will give it more of a designed feel.