The Homeland Security Department is proposing to replace the five colours with clearer language to describe the threat from terrorism, officials say.

BBC: US may scrap colour-coded terror alerts

Only four or five colours (and only the local colours of the object), only the brush, an empty canvas without preliminary sketches and, at most, a day to work in.

ECONOMIST: Avigdor Arikha, painter of life, died on April 29th, aged 81

Five to seven years of this, with each bit of the sky being recorded in five different colours, should be enough to complete coverage of a quarter of the sky.

ECONOMIST: The Sloan star survey: An intergalactic cruise | The