A color gamut defines a more specific range of colors from the range of colors identifiable by the human eye (i.e., the visible spectrum). While color imaging devices include a wide range of devices, such as digital cameras, scanners, monitors, and printers, since the range of colors they can reproduce varies, the color gamut is established to make these differences clear and to reconcile the colors that can be used in common between devices.

Various methods are used to express (diagram) the color gamut, but the common method used for display products is the xy chromaticity diagram of the XYZ color system established by the International Commission on Illumination (CIE). In an xy chromaticity diagram, the colors of the visible range are represented using numerical figures and graphed as color coordinates. In the following xy chromaticity diagram, the area shaped like an upside-down "U" surrounded by dotted lines indicates the range of colors visible to human beings with the naked eye.

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The importance of color gamut depends largely on the user, for the average user the color gamut type means nothing but for designers or people who deal with digital artwork in general, the understanding of color gamut is crucial when it comes to "Getting it right!"

CIE 1931 color space (system)
In the research of color space, CIE 1931 color space (or CIE XYZ color space) is the first model to define color space mathematically. It is created by the International Commission on Illumination (CIE) in 1931. It’s principle of color vision is based on human’s eye direct measurement, so it is often defined as a basis for other color spaces.

SRGB is a standard RGB color space created cooperatively by HP and Microsoft in 1996 for use on monitors, printers and the Internet. Since SRGB is the standard color space model in window environment,so most video or imaging equipment manufacture are all supporting SRGB color space, such as cameras, video camera, scanner and copier. You can find the SRGB option in those device because it can make sure that the color device and computer software used between input and output is compatible. Both devices use SRGB can reduce the color difference between the transformations. In other words, SRGB is the standard color mode used in general electronic products.



This post has been edited by Mr BenQ: Dec 16 2015, 11:18 PM

When you generate a color using graphic software like Photoshop on your computer, but when the same color is shown on a different computer, the color may not necessarily look the same.

This is because not every computer supports Adobe RGB. This is also the reason that most of current digital cameras still supports SRGB since it makes it easier to share or convert images from one to another.

Color Gamut means the color people can see through naked eye and usually the CIE1931 system is used to define basic color range.

RGB is an abbreviation of RED, GREEN and BLUE.

SRGB, Adobe RGB, and NTSC RGB are color space, a combination of color range defined by difference purpose or devices.