what colour is your wall in your hallway?pick one or two shade darker than white beige or grey, it depends on your furniture and walls.

good luck

It depends. Can you share photos or floor plans of the house? You can attach them to a comment under here.

If you're in a warm country or the porch is enclosed (roof, walls, door), then I'd probably have marble there too. If you like to do something different in the porch area, you could incorporate a (mosaic) design in the floor, or a different colour marble border

I recommend you to use a light grey for tiles as walls and flooring are mostly white and grey in your home, by using light grey you create continuously and all your home has same colour and style. I recommend you to use light beige in your interior as too much grey and white is too much cold. if you are planning to have outdoor furniture, there are great beige and brown colours for outdoor furniture which are available in the market.