Windows with the shutters and curtains closed show up in the images in a deep blue colour, demonstrating little heat is escaping.

BBC: Shutters and curtains 'act as double glazing'

Apart from collecting prenatal pottery pieces (there seems to be no restriction against it), locals and tourists can enjoy a refreshing swim in the rolling, blue waves of the Black Sea -- so called for the colour of its deep waters densely populated with algae.

BBC: Crimea, the Ukraine��s odd beach paradise

Though bright-red Japanese maples are most recognisable, many other showy trees burst into colour, like the deep golden ginkgo and burnt-orange zelkova trees.

BBC: K��y��: Japan��s autumn explosion of colour

Good colour sorters need to learn to tell three dozen leaf shades ranging from a deep brown to a rich green at a glance.

ECONOMIST: Cuban cigars