The Blue Hour

The blue hour is the period of twilight each morning and evening when the sun is a significant distance below the horizon and the residual, indirect sunlight takes on a predominantly blue hue. This effect is caused by the relative diffusability of short blue wavelengths of light versus the longer red wavelengths. During the blue “hour” (typically the period is about 40 minutes in length), red light passes straight into space while blue light is scattered in the atmosphere and therefore reaches the earth’s surface. Because of the quality of the light, this period is treasured by artists . . . .

The blue hour is famous for its romantic connotations, particularly in the arts. A colloquial French saying dictates that the blue hour is a time of confusion and mystery, since it is impossible to determine whether it is really night or day.

Source: “Blue Hour” – Wikipedia

 

Hazy blue hour in Grand Canyon.
Hazy blue hour in Grand Canyon.JPG
Michael Gäbler [CC BY 3.0], via Wikimedia Commons
Hazy blue hour in Grand Canyon. View from the South Rim.
August 1988

 

A seascape after sunset. Just north of Cabo da Roca, Portugal
Seascape after sunset denoised.jpg
Rnbc at the English language Wikipedia [GFDL or GFDL], via Wikimedia Commons
A seascape after sunset. Just north of Cabo da Roca, Portugal
24 November 2007
Source: File:Seascape after sunset.jpg

 

The Salt Ponds of Amboy at Sunset
The Salt Ponds of Amboy at Sunset.jpg
By Photographersnature (Own work) [CC BY-SA 3.0], via Wikimedia Commons
The Salt Ponds of Amboy at Sunset
7 March 2012, 17:45:44

 

Exterior view of the Palácio da Alvorada, as seen from the Reflecting Pool.
Palacio da Alvorada Exterior.JPG
Palácio do Planalto [Attribution], via Wikimedia Commons
Exterior view of the Palácio da Alvorada, as seen from the Reflecting Pool.
4 May 2006

 

The Windmills of Consuegra (Castilla-La Mancha, Spain), seen at dusk in the image, were built in the first half of the 19th century and were proclaimed as Spanish Historical Site in 2008.
WLM14ES – Molinos La Mancha – Hugo Díaz-Regañón.jpg
By Hugo Díaz-Regañón (Molinos La Mancha) [CC BY-SA 2.0], via Wikimedia Commons
The Windmills of Consuegra (Castilla-La Mancha, Spain), seen at dusk in the image, were built in the first half of the 19th century and were proclaimed as Spanish Historical Site in 2008.
8 December 2009, 19:25

 

 Lower Peirce Reservoir, Singapore.
Lower Peirce Reservoir, Singapore – 20090905-01.jpg
By William Cho. [CC BY-SA 2.0], via Wikimedia Commons
Lower Peirce Reservoir, Singapore. (HDR with five images.)
5 September 2009, 19:27
Source: Lower Pierce Reservoir in HDR

 

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2 thoughts on “The Blue Hour

  1. Lovely post and colour Arlene. I have seen this blue many times in my mis-spent youth; lying in the grass, covered with dew. Well, in the Army I did silly things like that ! 😉 ❤

    Like

    1. Thank you, Ralph! 🙂 Blue is one of my favorite colors, so I was happy to discover the existence of the blue hour. Yes, the joys of mis-spent youth are fun to remember! 🙂 When I was younger, a day seemed so much longer, especially the long summer days. Now a day seems like a few hours. Where did all the time go?

      I appreciate that you liked this post and “Twilight” and that you took the time to drop by and leave a wonderful comment. I hope you enjoy the rest of your weekend! 🙂

      Liked by 1 person

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