Type of site
Search engine
Available in English, Portuguese, French, Czech, Italian, Dutch
Owner Heap Media Australia
Created by Toby Heap[1]
Alexa rank Negative increase 54,815 (April 2014)[2]
Commercial Yes
Registration No
Launched January 2007
Current status Active

Blackle is a website powered by Google Custom Search and created by Heap Media, which aims to save energy by displaying a black background and using grayish-white font color for search results.[3] Blackle claims having saved over 4 MWh of electrical energy up to November 2013,[4] a claim currently under dispute.[5] For comparison, the average American household consumes 11 MWh of electrical energy per year.[6]


The concept behind Blackle is that computer monitors can be made to use less energy by displaying much darker colors. Blackle is based on a study which tested a variety of CRT and LCD monitors. There is dispute over whether there really are any energy saving effects, especially for users of LCD screens, where there is a constant backlight.[7][8][9]

This concept was first brought to the attention of Heap Media by a blog post, which estimated that Google could save 750 megawatt hours a year by utilizing it for CRT screens.[1][10] The homepage of Blackle provides a count of the number of watt hours claimed to have been saved by enabling this concept.

See also


  1. 1 2 Moses, Asher (2007-08-01). "Search site cashes in on eco-guilt". The Sydney Morning Herald.
  2. " Site Info". Alexa Internet. Retrieved 2014-04-01.
  5. "Black vs white screen power consumption". May 13, 2010. Retrieved 2010-09-08.
  6. "Residential Average Monthly Bill by Census Division, and State". EIA. Retrieved April 27, 2012.
  7. Roberson, Bobby; Homan, Josh; Mahaja, Gage; Nordman, Larry; Webber, Carrie; Brown, Ricardo; McWhinney, Marla; Koomey, Cainan (June 2001). "Energy Use and Power Levels in New Monitors and Personal Computers" (PDF).
  8. Monitor Energy Information for Energy Star, United States Department of Energy
  9. Weihl, Bill (August 9, 2007). "Is black the new green?". Official Google Blog. Google, Inc. Retrieved 2010-05-14.
  10. Black Google Would Save 750 Megawatt-hours a Year, by ecoIron. The blog post by that inspired Blackle.

External links

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