Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour model. It lies between violet and green on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called Tyndall scattering explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective. Blue has been an important colour in art and decoration since ancient times.
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Natural Kashmir Blue Sapphire 7820 ct .  Original
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Vintage Vera Scarf Vera Neumann Red White Blue Geometric Design Nice!
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Natural  Kashmir  Blue Sapphire 1290 ct
Natural Kashmir Blue Sapphire 1290 ct
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Natural Kashmir Blue Sapphire 1080 ct
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Natural blue Diamond (India) 17.75 ct
Natural blue Diamond (India) 17.75 ct
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Red White Blue Abstract Everlasting Handmade Rose Bouquet By artist #RoseManJ
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World Class Blue Sapphire Ring 69cts Untreated
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Original and Reproduction Rights
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X6 New vintage 1960s Swedish blue grey wool scarfs / hats military surplus
X6 New vintage 1960s Swedish blue grey wool scarfs / hats military surplus
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X6. New vintage Swedish blue grey wool scarfs / hats military surplus clothing
X6. New vintage Swedish blue grey wool scarfs / hats military surplus clothing
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X2 New vintage 1960s Swedish blue grey wool scarfs / hats military clothing
X2 New vintage 1960s Swedish blue grey wool scarfs / hats military clothing
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Natural blue Diamond (India) 4.90 ct
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'' SYMPHONY IN BLUE ''  HUGE 30'' X 40'' CANVAS ABSTRACT PAINTING BY JAMES CHEN
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BLUE BUTTERFLIES # 2 HUGE 30'' X 40'' PAINTING ON CANVAS BY JAMES CHEN
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BLUE BUTTERFLIES HUGE 30'' X 40'' PAINTING ON CANVAS BY JAMES CHEN
BLUE BUTTERFLIES HUGE 30'' X 40'' PAINTING ON CANVAS BY JAMES CHEN
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Women Handmade Knitted Beanie Hat Lady Crochet Pearl Skullies Beanies Vintage
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Gold Plated Black Lucky Feng Shui Pixiu Mantra Black Obsidian Wealth bracelet
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