Colour is added by using three separate arrays, each fitted with a filter for one of the primaries red, green and blue that, in combination, produce a full-colour image.

ECONOMIST: Curtains for celluloid

Benetton, a fashion retailer, successfully standardised most of its products, except for their colour, which was added at the last minute in response to the latest tastes.

ECONOMIST: Financial mergers

Free hats and flags were given out by the first teams to arrive and soon a sea of green hats added to the colour of the Waterfront, which provided an idyllic backdrop for the start of the race between 100 riders over a 1, 349.9km course.

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As portable devices become more sophisticated, with added functions and large colour screens, they are draining batteries faster.

ECONOMIST: Consumer fuel cells

From Saturday, the Virgin logo was added to the previously unbranded white cars - and a new colour scheme will be unveiled at next weekend's Malaysian Grand Prix.

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It seems a layer of varnish added later to protect the work is in fact turning the yellow to a greyish-orange colour.

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