Blueish grey slate tiles - use throughout entire first floor and then super amazing fluffy white rugs!!
I love decor with lots of different textures, and when things look just a little thrown around.
Simple table and gorgeous industrial lights. See www.willowandstone.co.uk for kitchen lighhting.
Giant window glass wall.
Monochrome chic. Simple is best in a narrow hallway. White painted stairs make them appear wider and the grey runner is both practical and elegant. Seek out a slim console - vintage or modern - thats useful and decorative but not space-consuming.