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Magenta () is variously defined as a purplish-red,〔''Webster's New World Dictionary of the American Language'' (1964)〕 reddish-purple, or a mauvish-crimson color.〔(definition of magenta ) in Oxford dictionary (American English) (US)〕 On computer screens, it is made by mixing equal amounts of blue and red. On color wheels of the RGB (additive) and CMYK (subtractive) color models, it is located midway between red and blue. It is the complementary color of green. It is one of the four colors of ink used in color printing and by an inkjet printer, along with cyan, yellow, and black, to make all the other colors. The tone of magenta used in printing is called "printer's magenta" (Magenta (CMYK)). Magenta was first introduced as the color of a new aniline dye called fuchsine, patented in 1859 by the French chemist François-Emmanuel Verguin. Its name was changed the same year to magenta, to celebrate a victory of the French and Sardinian army at the Battle of Magenta on June 4, 1859, near the Italian town of that name.〔 The web color magenta is also called fuchsia. ==In optics and color science== Magenta is an extra-spectral color, meaning that it is not found in the visible spectrum of light. Rather, it is physiologically and psychologically perceived as the mixture of red and violet/blue light, with the absence of green.〔(【引用サイトリンク】title=theory of colour: Orange is Tertiary )〕 In the RGB color system, used to create all the colors on a television or computer display, magenta is a secondary color, made by combining equal amounts of red and blue light at a high intensity. In this system, magenta is the complementary color of green, and combining green and magenta light on a black screen will create white. In the CMYK color model, used in color printing, it is one of the three primary colors, along with cyan and yellow, used to print all different colors. If magenta, cyan, and yellow are printed on top of each other on a page, they make black. In this model, magenta is the complementary color of green, and these two colors have the highest contrast and the greatest harmony. If combined, green and magenta ink will look dark gray or black. The magenta used in color printing, sometimes called process magenta, is a darker shade than the color used on computer screens. A purple hue in terms of color theory, magenta is evoked by light having less power in green wavelengths than in blue/violet and red wavelengths (complements of magenta have wavelength 500–530 nm).〔Bruce MacEvoy. "(Light and the Eye )", ''Handprint''. A chart citing R.W.G. Hunt 2004. ''The Reproduction of Color''.〕 In the Munsell color system, magenta is called ''red–purple''. If the visible spectrum is wrapped to form a color wheel, magenta (additive secondary) appears midway between red and violet. Violet and red, the two components of magenta, are at opposite ends of the visible spectrum and have very different wavelengths. The additive secondary color magenta, as noted above, is made by combining violet and red light at equal intensity; it is not on the actual spectrum. File:RGB illumination.jpg|In the RGB color model, used to make colors on computer and television displays, magenta is created by the combination of equal amounts of blue and red light. File:RBG color wheel.svg|In the RGB color wheel of additive colors, magenta is midway between blue and red. File:SubtractiveColor.svg|In the CMYK color model, used in color printing, cyan, magenta, and yellow combined make black. In practice, since the inks are not perfect, some black ink is added. File:Linear visible spectrum.svg|Magenta is not part of the visible spectrum of light. File:Blended colour wheel.svg|Visible spectrum wrapped to join violet and red in an additive mixture of magenta. In reality, violet and red are at opposite ends of the spectrum, and have very different wavelengths. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Magenta」の詳細全文を読む スポンサード リンク
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