Blue

:For other uses, see Blue (disambiguation)

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Blue is one of the three primary additive colors; blue light has the shortest wavelength range (about 420-490 nanometres) of the three primary colors. The English language commonly uses "blue" to refer to any color from blue to cyan.

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An example of a blue color in the RGB color space has intensities on a 0 to 255 scale. Blue is the complement of yellow. For this reason, blue 80A filters are used to correct for the excessive redness of tungsten lighting in color photography.

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Many languages do not have separate terms for blue and green, and in the Swedish language, bl?, the modern word for blue, was used to describe black until the early 20th century. The modern English word blue comes from the Middle English, where it began to be used along with bleu, an Old French word of Germanic origin (possibly Old High German blao, "shining"). A Scots and Scottish English word for "blue" is blae, from the Middle English bla ("dark blue", from the Old English bl?d).

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Colors: :For alternative meanings, see color (disambiguation)....

Light: Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific setting, electromagnetic radiation of any wavelength. The three basic dimensions of light (i.e., all electromagnetic radiation) are:...

Wavelength: :For the album by Van Morrison, see Wavelength (album)....

Blue related Images and Photos (experimental)

Blue	BLUE	Blue	Blue I
Blue Sun	Blue Boy	Blue III	Blue Cat
Blue Sky	Blue Ice (DVD)	Blue Rose	Blue Curl