Office Development in Reading. The greyish blue TERRART®-MID panels were specially developed for this scheme. 70 Office Development, Reading, Großbritannien, Architekt: Sidell Gibson. The office scheme in Reading clearly illustrates the colour variations offered by terracotta – here in a blue/grey chromatic shade. Even such a small-scale façade derives a unique radiance from ceramic components whose shape and colour are tailored to the particular features of the building.