The Blue of the Pacific

The color of the sea (the Pacific Ocean, in this case) according to Tim Severin:

Now that the sun had come out the ocean itsekf turned the most remarkable shade of blue...Under those conditions the blue of the Pacific was very different from any other sea. It was not the pale green-grey turning to blue of the North Atlantic, nor the azure of the Carribean or Arabian Sea, nor the dull brownish blue of the China Sea, but a deep indigo-blue. What is more, the special Pacific blue seemed to transfer everything in the sea: the electric luminescence of the plankton was a more powerful luminous blue, the blue of fish more vivid, the shadow under the raft deep blue, even the shark we had caught was such a startling blue in the first few hours after it came out of the water that I thought it must be some rare new species. Only later did the skin of the shark turn back to its more usual blue-and-white shading. As for the water itself, it was such an intense colour it seemed that blue was the only colourin the spectrum, and the special signature of the Pacific.