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{{Unreferenced stub|auto=yes|date=December 2009}} {{unreferenced|date=December 2009}}
[[File:CIE1931xy blank.svg|right|thumb| [[File:CIE1931xy blank.svg|right|thumb|
The ]. The ].
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The spectrum is often divided up into named colors, though any division is somewhat arbitrary: the spectrum is continuous. Traditional colors include: ], ], ], ], ], and ]. The spectrum is often divided up into named colors, though any division is somewhat arbitrary: the spectrum is continuous. Traditional colors include: ], ], ], ], ], and ].


The division used by ], in his ], was Red, Orange, Yellow, Green, Blue, Indigo and Violet; a ] for this order is ]. In modern divisions of the spectrum, ] is often omitted as simply a tone of blue or violet, that is, created by the addition of grey. The division used by ], in his ], was Red, Orange, Yellow, Green, Blue, Indigo and Violet; a ] for this order is ]. In modern divisions of the spectrum, ] is often omitted; see
] for details.


==Non-spectral colors== ==Non-spectral colors==
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* Any color obtained by mixing a gray-scale color and yet another color (either spectral one or not spectral), such as ], which is a mixture of a ]dish color and white. * Any color obtained by mixing a gray-scale color and yet another color (either spectral one or not spectral), such as ], which is a mixture of a ]dish color and white.
* ] colors, which in ] also include ] colors, ] colors, and other colors on the ], which are various mixtures of violet and red light. * ] colors, which in ] also include ] colors, ] colors, and other colors on the ], which are various mixtures of violet and red light.
* Any ] color.

{{clear}}
== Table of spectral and near-spectral colors ==
Most of colors listed are not usually seen with the maximal ], but can be saturated enough to be perceived very nearly to their ] spectral color. Ranges of wavelengths and frequencies are only approximate. The only ]-implemented colors which might be spectral are its primaries: red, green, and blue.
{|class=wikitable align="center"
| 
!]!!Sample
! Wavelength, ]
! ], ]
! ]
! Comments
|-
| bgcolor="#CC3333" rowspan=2 | 
! colspan=2 style="text-align: left" |]
| align="right" |700–630  
| align="right" |430–480  
|<!-- range needed -->
|A traditional, broad color term
|-
|• red (RGB)
| bgcolor="#FF0000" |&nbsp;
|?
|?
| align="right" |0°
|-
| bgcolor="#FF8000" |&nbsp;
! style="text-align: left" |]<br/>]
| bgcolor="#FF8000" |&nbsp;
| align="right" |620–585 &nbsp;
| align="right" |483–512 &nbsp;
| align="right" |≈ 30°
|-
| bgcolor="#EEEE33" |&nbsp;
! style="text-align: left" |]
| bgcolor="#FFFF00" |&nbsp;
| align="right" |585–560 &nbsp;
| align="right" |512–540 &nbsp;
| align="right" |≈ 60°
|A traditional color term
|-
| bgcolor="#BFFF00" |&nbsp;
!style="text-align: left"|]
| bgcolor="#BFFF00" |&nbsp;
| align="right" |564 &nbsp;
|? &nbsp;
| align="right" |≈ 75°
|May be classified as either green or yellow
|-<!-- to be expanded. sorry, do not have time just now -->
| bgcolor="#33EE33" rowspan=1 |&nbsp;
!style="text-align: left"|]
| bgcolor="#00FF00" |&nbsp;
| align="right" |560–??? &nbsp;
| align="right" |540–??? &nbsp;
|≈ 120°
|A traditional, broad color term
|-
| bgcolor="#00FFFF" |&nbsp;
!style="text-align: left"|]
| bgcolor="#00FFFF" |&nbsp;
| align="right" |≈ 505 <ref name="cyan"> </ref>
| align="right" |≈ 593 &nbsp;
| align="right" |180°
|Sometimes classified as blue
|-
| bgcolor="#3399FF" rowspan=4 |&nbsp;
!style="text-align: left" colspan=2 |]
| align="right" |490–450 &nbsp;
| align="right" |610–670 &nbsp;
|<!-- range needed -->
|A traditional, broad color term
|-
|• blue (])
| bgcolor="#0093AF" |&nbsp;
|? &nbsp;
|? &nbsp;
| align="right" |190°
|-
|• ]
| bgcolor="#007FFF" |&nbsp;
| align="right" |≈ 488 <ref name="007fff">http://encycolorpedia.com/007fff</ref>
| align="right" |≈ 614 &nbsp;
| align="right" |≈ 210°
|-
|• blue (RGB)
| bgcolor="#0000FF" |&nbsp;
| align="right" |≈ 445 &nbsp;
| align="right" |≈ 674 &nbsp;
| align="right" |240°
|-
| bgcolor="#4000FF" |&nbsp;
!style="text-align: left"|]
| bgcolor="#4000FF" |&nbsp;
| colspan=4 align=center style="letter-spacing:0.125em"|definition is controversial
|-
| bgcolor="#7F00FF" |&nbsp;
!style="text-align: left"|]
| bgcolor="#7F00FF" |&nbsp;
| align="right" |450–400 &nbsp;
| align="right" |670–750 &nbsp;
|?
|Very dim and rarely seen
|}


==See also== ==See also==
* ] * ]

== References ==
{{reflist}}


{{DEFAULTSORT:Spectral Color}} {{DEFAULTSORT:Spectral Color}}
] ]

{{Color-stub}}

Revision as of 08:57, 11 June 2013

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Find sources: "Spectral color" – news · newspapers · books · scholar · JSTOR (December 2009) (Learn how and when to remove this message)
The CIE xy chromaticity diagram. The spectral colors are the colors on the horseshoe-shaped curve on the outside of the diagram. All other colors are not spectral: the bottom straight line is the line of purples, while within the interior of the diagram are unsaturated colors that are various mixtures of a spectral color or a purple color with white, a grayscale color. White is in the central part of the interior of the diagram, since when all colors of light are mixed together, they produce white.

A spectral color is a color that is evoked by a single wavelength of light in the visible spectrum, or by a relatively narrow band of wavelengths. Every wavelength of light is perceived as a spectral color, in a continuous spectrum; the colors of sufficiently close wavelengths are indistinguishable.

The spectrum is often divided up into named colors, though any division is somewhat arbitrary: the spectrum is continuous. Traditional colors include: red, orange, yellow, green, blue, and violet.

The division used by Isaac Newton, in his color wheel, was Red, Orange, Yellow, Green, Blue, Indigo and Violet; a mnemonic for this order is Roy G. Biv. In modern divisions of the spectrum, indigo is often omitted; see indigo #Classification as a spectral color for details.

Non-spectral colors

Among some of the colors that are not spectral colors are:

  • Grayscale (achromatic) colors, such as white, gray, and black
  • Any color obtained by mixing a gray-scale color and yet another color (either spectral one or not spectral), such as pink, which is a mixture of a reddish color and white.
  • Purple colors, which in color theory also include magenta colors, rose colors, and other colors on the line of purples, which are various mixtures of violet and red light.
  • Any CMYK color.

Table of spectral and near-spectral colors

Most of colors listed are not usually seen with the maximal colorfulness, but can be saturated enough to be perceived very nearly to their dominant wavelength spectral color. Ranges of wavelengths and frequencies are only approximate. The only RGB-implemented colors which might be spectral are its primaries: red, green, and blue.

  Color term Sample Wavelength, nm Frequency, THz Hue Comments
  Red 700–630   430–480   A traditional, broad color term
• red (RGB)   ? ? 0°
  Orange
Amber 		  620–585   483–512   ≈ 30°
  Yellow   585–560   512–540   ≈ 60° A traditional color term
  Lime   564   ?   ≈ 75° May be classified as either green or yellow
  Green   560–???   540–???   ≈ 120° A traditional, broad color term
  Cyan   ≈ 505 ≈ 593   180° Sometimes classified as blue
  Blue 490–450   610–670   A traditional, broad color term
• blue (Munsell)   ?   ?   190°
• Azure   ≈ 488 ≈ 614   ≈ 210°
• blue (RGB)   ≈ 445   ≈ 674   240°
  Indigo   definition is controversial
  Violet   450–400   670–750   ? Very dim and rarely seen

See also

References

  2. http://encycolorpedia.com/007fff
Category: