Instead of giving you high-contrast scenes bathed in golden tones, the blue hours provide you with this fantastic overcast lighting across your scene – giving you deep saturation of colors and great detail. The time just before sunrise or after sunset – also known as twilight – gives off a blue/purple hue that is truly unique. Combine this with a strong composition, and you’ll be well on your way to creating beautiful blue hour images.
Below is our collection of some of the best blue hour photos from around the world.
midlander1231

Matthew Stewart

Stefan Mendelsohn

Trey Ratcliff

PHOTOGRAPHER

Jason Samfield

Mike Behnken

joiseyshowaa

Ali Nishan

Christopher Chan

source: http://www.thephotoargus.com/inspiration/40-inspiring-examples-of-blue-hour-photography/