The hallway and stairwell look a whole lot better already. The white walls have only been painted with primer, in the end it should be a light and dark grey on the walls.
As for the living room, bf isn't convinced on the colors, but he gave me carte blanche so tough luck Imagine a sofa in warm red to complement the colors It's unconventional, but I've never been one for following trends
And the floor looks great. It should turn out a bit darker, as the floor is pretty dirty in the photos.