No doubt about it, orange is a power colour. Some theorists maintain that when you are in the presence of orange, you increase the oxygen supply to the brain, which stimulates mental activity. It is also thought to encourage sociability by energising people and lessening their inhibitions.
If bold orange walls are not your thing, subtle colour is just as successful in creating a stimulating, sociable environment. You could try earthy hues like rust orange, ochre, vermillion and mahogany or softer shades such as coral, orange rose, sunset, and saffron. Work them into the study room and you might just give yourself the mental edge.