The sky turns pink, peach and apricot, shading into pale Prussian grey.

BBC: Sardinia, land and sea

Borrowman pointed out a distinctive pale-grey saddle patch behind the dorsal fin and identified the orca as one he sees frequently: a 43-year-old male known as A38.

BBC: A quest to see Canada��s orcas in the wild

The metal's matt sheen generates reflections of infinite variety and colour that shift minute by minute, from silvery grey to a soft pale gold.

ECONOMIST: New architecture

His skin flushed from pale blue to beige to a dappled grey, taking on the tone of every piece of coral and rock he encountered.

BBC: The end of a wandering way of life?

When last seen he was wearing a pale denim long-sleeved shirt with a collar, grey chino trousers and navy blue leather boots.

BBC: Waters searched for Souvik Pal and Michael Simpson