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Tag Archives: blue background images

Blue Wallpapers and Blue Backgrounds

Blue Wallpapers 19

Blue Wallpapers HD : Blue is the colour between violet and green on the optical spectrum of visible light. The clear sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. Blue has been used for art, decoration and as a clothing dye since ancient times. Surveys in the US and Europe show that ...

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