The colour design for the outer shell of the building complex corresponds with Scheper's concept that colour could and should support the structural impact of the architecture. The strong light/dark contrasts and the individually occurring colour accents were intended to create tension and produce correspondencies that preserve the equilibrium of the facility. For example, the colour red distinguishes the areas of the building that display a certain openness or transparency – doors, windows and balconies – while a circumferential band in a neutral grey interconnectevery part of the building.