I remember watching something about the effect of colours on our everday lives. Oranges are good for dining rooms as they encourage eating, purple for bedrooms etc. The college I went to for Yrs 11 & 12 was new and painted in greys and pinks, something to do with helping as study. A large workplace I was at had a lot of citrus colours, in lemons and limes. The whole design of the building was meant to be cutting edge with productivity in the workplace.