Gap has banned extensive use of the colour red in its in-store ads to avoid causing offence.

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Huge crowds dressed in red - the colour of his party - cheered and sang as Mr Kenyatta gave his final address in the Uhuru stadium that shares his first name - meaning "Freedom" in Swahili.

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Experts say shoppers should prepare themselves for a high street where the dominant colour is red: as in posters with big red letters advertising year-round sales and many more "For Lease" signs.

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And, indeed, the majority of fast-food restaurants feature red prominently in their colour schemes.

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In addition, star colour is simulated for noticeably red, blue and yellow stars, along with the changing brightness of three variable stars Algol, Mira and Delta Cephei.

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Shot predominantly in black and white, with spot colour for a Jewish child's red coat the film's unique identifying mark it recalls the tradition of post-war Italian neo-realism and the even older photographs of Roman Vishniac of Jewish life in Poland before the Nazis.

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In Caracas, the main avenues were filled with red-shirted crowds, the favoured colour of Chavez supporters.

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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.

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The grey stands in contrast to the weathered red outer-coating of the Sheepbed unit, and the darker colour hints at a different oxidation state for iron (Fe) minerals that might be inside the rock.

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In the quasar spectra, some of the dark lines were shifted slightly towards the red end of the colour spectrum and others towards the blue end.

ECONOMIST: Fundamental physics