Black and white are the most extreme examples of heavy and lightweight colours. The movement is in the height. Heavy colours, when applied above the viewer, tend to press down. Because of their heaviness, the weight is literally felt. A black ceiling will be estimated lower than a white one. Heavy is also connected to hard and large, while lightweight is felt rather fine, small and soft (Osgood, 1957). If colours have the same intensity such as red and green, red will outweigh green. (Meerwein, 2007)