When the school officially opened in January 2007, groundskeepers sprayed the dry, yellow grass with green dye in preparation for the arrival of dignitaries like Mandela and celebrity friends like Diane Sawyer and Spike Lee.

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Henry acknowledges the truth of his childhood lesson as he runs frantically along the margin of the knee- high fire in the yellow- brown grass, flapping his arms to no real effect.

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Seurat mixed in a zinc yellow to make different hues, for grass and trees, for example.

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During the long, 540km bus trip east along the coast from Cide to the small seaside city of Ordu, the landscape transitions from dense green forestland to rolling plains with gorgeous yellow sunflower fields to meadows dotted with wild purple grass.

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The bottom is mainly brilliant white sand or greenish grass, but we were searching for the vaguely brown and yellow hues that indicate the rocks and coral where Caribbean spiny lobster (commonly referred to as "bugs" for their insect-like appearance) live.

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The gravel-pit is very large and wide, with grass growing round the edges at the top, and dry stringy wildflowers, purple and yellow.

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At first it looks more like a fat white and yellow fish swimming through a green sun-speckled ocean, as if it and the tree and the grass were occupants of a fantastical aquarium.

ECONOMIST: Leon Kossoff