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Red, green and blue light, when added together make white. Only when
coloured surfaces are lit by pure white light, do they appear in their
"true" colour. Video signal is made up of red, green and blue
components which are added together to create the full spectrum of colour
on the screen. These statements come from colour and video theory, and
this exhibit gives users the chance to test these ideas and more.
The colour of the light source can be set by turning the 3 coloured
light sources on or off. A fourth source, white, is available as a comparison.
The lit surfaces can be varied by rotating the coloured cube: There
are the basic red, blue and green swatches, there is white, and there
are the printer´s colours cyan, magenta and yellow.
The cube is covered by a video camera and the individual red, green and blue values can be adjusted on the way to the monitor via a colour processor.
The exhibit was built in 1999 for the Technical
Museum, Vienna.
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