The colour of home

'Earthrise', from NASA, taken on board Apollo 8 by astronaut William Anderson on the first ever manned lunar orbit in 1968

"For most of history, blue was the colour of the beyond. It was the colour of the horizon, the colour of the thing that so many of us were aspiring to and hoping to escape to. But in 1968 that dream finally came true. When in 1968 we finally went beyond that horizon, we discovered that blue was actually the colour of home."

~Dr James Fox, The History of Art in Three Colours: Blue