We need a new patio but are finding it really hard to choose the right tiles. We have looked at so many but can't quite find the right thing. At the moment we are having an extension built which will have white with a pale grey marble effect tile 600 x 600. This will lead out onto a patio at the same level. We would like a contrasting tile outside and we're thinking of a pale grey. We would like a smoothish sharp cornered porcelain tile but can't decide whether to stick with 600x600 or have 600x900. We also are struggling to find a pale grey that isn't too beige or too green in tone. Does anyone have advice or suggestions please? The size of the paio is about 46 square m over 2 levels with some steps.