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Type of site
Search engine
Available inEnglish, Portuguese, French, Czech, Italian, Dutch
OwnerHeap Media Australia
Created byToby Heap[1]
Alexa rankNegative increase 97,662 (May 2019)[2]
LaunchedJanuary 2007
Current statusActive

Blackle is a website powered by Google Custom Search and created by Tony Heap of 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 7 MWh of electrical energy as of February 2019,[4] a claim under public 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[edit]


  1. ^ a b Moses, Asher (2007-08-01). "Search site cashes in on eco-guilt". The Sydney Morning Herald.
  2. ^ " Site Info". Alexa Internet. Retrieved 2019-05-14.
  3. ^
  4. ^
  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). Archived from the original (PDF) on 2009-02-06. Retrieved 2007-06-16.
  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[edit]