abstract angled angles appearances architectural architecture buildings business-district city color colour commercial commercial-city-building contemporary contrast contrasting distance distant elements exterior external geometric geometric-shapes gray grey heights high high-rise light linear lines modern office-buildings panelling panels patterned patterns perspectives rectangles rectangular shapes style surface textured textures unusual walls box-like business district CBD city scapes city views colors colours concrete glass high rise Hong Kong office buildings reflections skyscrapers sleek slim views wealth windows blue city-scapes city-views distinctive offices reflective curve curved appearance building edged edges height pointed sharp surfaces wall accommodation balconies balcony gardening gardens lighting plants shadows size sunlight vegetation colored coloured commercial-building metropolis metropolitan-area tower-block urban-area skies sky