I am taking large chunks of Mirror's Edge architecture, style, props, materials (but not ripping them, I am recreating everything, something direct copies, other things just influenced), and mix it with my own ideas, or things I saw somewhere else.
The walls will either be white/bright grey or orange, almost like the dev texture, just with a bit of structure on them, with a normal map and some specular and maybe a detail map, and some of the concrete, but that will be another texture later, since the concrete is now only a placeholder. It will be more washed out and whitish, too.
Especially these places obviously directly influenced certain rooms of my map (bombsite A and atrium). I had to change them quite a lot, of course, but still Mirror's Edge fans should have long ago spotted the similarities:
I can only suggest to buy and play Mirror's Edge. Otherwise you won't really understand or like the overall style of the map, or perhaps if you don't like Mirror's Edge, you won't anyway.