With an average thirty minute window of opportunity, ‘blue hour’ might not strictly do what it says on the tin but as crucial artistic elements go, light matters. In fact, no single factor matters more en route to that perfect shot than the quality of the light. So for those willing to chase it from dusk to dawn, blue hour might be short and sweet but with it yields a truly sublime and colourful bounty; as daybreak and day’s end find the sun just out of reach, incredible shades of blue suffuse the landscape, turning twilight’s brief transition into arguably the most intensely photogenic time of day. With the sun dipped below the horizon, pastel hues give way to intense skies and a huge array of photographic opportunity as city and landscape shine. Take a look at some incredible examples of blue hour’s diffuse beauty at its mind-blowing best.