Numerous "props" have been created to act as cues or visual aids to articulate and draw attention to the role of colour in the environment. The colourbars are an intervention that increase our awareness of our surroundings and can be thought of as a kind of "Cultural Ecology". While it marks the (visual and material) differences between nature and culture it also maps out the complex interdependency between nature and culture and the fluid boundary that lies within this relationship.