This duplex penthouse has an amazing corner position with dramatic diagonal views of the San Francisco’s downtown. These views are framed in discontinuous groupings of conventional double hung windows within openings that are painted in grey and blue colors. These openings visually blends with the actual skyline very well. There are two living zones in the duplex. A darker inner one, lined with natural materials – walnut paneling and banquettes upholstered in deep blue mohair – defines the entry, stairwell and second floor pool/guest room. A bright outer zone, lit by windows, defines the double height corner living/media room and kitchen/dining area on the first floor and the master bedroom suite above. It’s contrasting neutral palette of white and grey synthetic materials – concrete, fritted-glass, and stainless and powdercoated steel – focuses attention on the “sky zone” that frames city views.