Steel Display
Red is the colour with the smallest wavelength. After a water depth of approximately five metres, a wavelength of around 625 - 780 nanometres is filtered out of the light. Orange is filtered out completely after a depth of approx. 15 metres, yellow after 30, green after 50 and blue after 60 metres. This means that the colour red is no longer present in the light spectrum at a depth of five metres and therefore cannot be reflected.
The "under water colour blind" project deals with this phenomenon and takes it as the basis for a series of photos taken under water.