In this photo that I took ten days ago of Totland Bay Pier on the Isle of Wight, there is a lot of blue. We become used to thinking of the sky and sea as blue, but in this picture it is easy to see how varied the colours can be. There is gradual shift from blue to off-white in the sky. In the sea there are three quite distinct bands, dark blue of deeper water, green-blue of shallow water and then light brown as the beach itself becomes visible through the water. There are also two other darker shades, where the groyne can be seen underwater and the thin shadow of the pier itself and finally the thin white strips where the tiny waves are breaking.