RGB color model

RGBRGBC-IRred, green, and blueRGB colorRGB colour modelred, green and blueRed-Green-BlueRGB (additive)RGB color cubeRGB value
The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors.wikipedia
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Red

Redscolor redredness
The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors.
It is a primary color in the RGB color model and the CMYK color model, and is the complementary color of cyan.

Blue

Dark BlueRoyal BlueLight blue
The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors.
Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour model.

Green

Dark GreenForest GreenKelly Green
The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors.
In subtractive color systems, used in painting and color printing, it is created by a combination of yellow and blue, or yellow and cyan; in the RGB color model, used on television and computer screens, it is one of the additive primary colors, along with red and blue, which are mixed in different combinations to create all other colors.

Image scanner

scannerscannersscanning
Typical RGB input devices are color TV and video cameras, image scanners, and digital cameras.
Color photos were sent as three separated RGB filtered images consecutively, but only for special events due to transmission costs.

Color model

color modelscolor systemcolour system
The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors.
This is called "RGB" color space.

Yellow

y'''ellowcanary yellowGold
When one of the components has the strongest intensity, the color is a hue near this primary color (red-ish, green-ish, or blue-ish), and when two components have the same strongest intensity, then the color is a hue of a secondary color (a shade of cyan, magenta or yellow).
In the RGB color model, used to create colors on television and computer screens, yellow is a secondary color made by combining red and green at equal intensity.

Magenta

m'''agentadyeMagenta (M)
When one of the components has the strongest intensity, the color is a hue near this primary color (red-ish, green-ish, or blue-ish), and when two components have the same strongest intensity, then the color is a hue of a secondary color (a shade of cyan, magenta or yellow).
On color wheels of the RGB (additive) and CMY (subtractive) color models, it is located midway between red and blue.

Adobe RGB color space

Adobe RGBAdobe RGB (1998)AdobeRGB
When the exact chromaticities of the red, green, and blue primaries are defined, the color model then becomes an absolute color space, such as sRGB or Adobe RGB; see RGB color spaces for more details.
It was designed to encompass most of the colors achievable on CMYK color printers, but by using RGB primary colors on a device such as a computer display.

Cyan

light cyanc'''yanblue (cyan)
When one of the components has the strongest intensity, the color is a hue near this primary color (red-ish, green-ish, or blue-ish), and when two components have the same strongest intensity, then the color is a hue of a secondary color (a shade of cyan, magenta or yellow).
In the additive color system, or RGB (additive) color model, used to create all the colors on a computer or television display, cyan is made by mixing equal amounts of green and blue light.

Digital camera

digital camerasdigitalcompact digital camera
Typical RGB input devices are color TV and video cameras, image scanners, and digital cameras.
Firmware in the camera, or a software in a raw converter program such as Adobe Camera Raw, interprets the raw data from the sensor to obtain a full color image, because the RGB color model requires three intensity values for each pixel: one each for the red, green, and blue (other color models, when used, also require three or more values per pixel).

Photography

photographerphotographicstill photography
The main purpose of the RGB color model is for the sensing, representation, and display of images in electronic systems, such as televisions and computers, though it has also been used in conventional photography.
Almost all digital cameras have an option to shoot in monochrome, and almost all image editing software can combine or selectively discard RGB color channels to produce a monochrome image from one shot in color.

CMYK color model

CMYKfour-color printingfour-color
Color printers, on the other hand are not RGB devices, but subtractive color devices (typically CMYK color model).
In additive color models, such as RGB, white is the "additive" combination of all primary colored lights, while black is the absence of light.

White

Pure Whitewhite lightwhitish
Zero intensity for each component gives the darkest color (no light, considered the black), and full intensity of each gives a white; the quality of this white depends on the nature of the primary light sources, but if they are properly balanced, the result is a neutral white matching the system's white point.
On the screen of a color television or computer, white is produced by mixing the primary colors of light: red, green and blue (RGB) at full intensity, a process called additive mixing (see image below).

Color photography

colour photographycolorcolour film
The first experiments with RGB in early color photography were made in 1861 by Maxwell himself, and involved the process of combining three color-filtered separate takes.
This is also known as the RGB color model.

Gamut

color gamutwide color gamutWide color
The difference in the signals received from the three kinds allows the brain to differentiate a wide gamut of different colors, while being most sensitive (overall) to yellowish-green light and to differences between hues in the green-to-orange region.
For example, while pure red can be expressed in the RGB color space, it cannot be expressed in the CMYK color space; pure red is out of gamut in the CMYK color space.

Pixel

megapixelpxMP
Each pixel on the screen is built by driving three small and very close but still separated RGB light sources.
In color imaging systems, a color is typically represented by three or four component intensities such as red, green, and blue, or cyan, magenta, yellow, and black.

S-Video

A/VS videoS-Video out
Early personal computers of the late 1970s and early 1980s, such as those from Apple, and Commodore's Commodore VIC-20, used composite video whereas the Commodore 64 and the Atari family used S-Video derivatives.
The image is originally captured in RGB form and then processed into three signals known as YPbPr.

SCART

PéritelRGB SCARTSCART RGB
This type of video signal is widely used in Europe since it is the best quality signal that can be carried on the standard SCART connector.
The signals carried by SCART include both composite and RGB (with composite synchronisation) video, stereo audio input/output and digital signalling.

CMY color model

pigment model (CMY)
This is essentially opposite to the subtractive color model, particularly the CMY color model, that applies to paints, inks, dyes, and other substances whose color depends on reflecting the light under which we see them.
This is essentially opposite to the additive color model, particularly the RGB color model, that applies to lights whose color depends directly on the light.

Quattron

RGBYRYGB color spaceSharp Quattron
The Quattron released by Sharp uses RGB color and adds yellow as a sub-pixel, supposedly allowing an increase in the number of available colors.
In addition to the standard RGB (Red, Green, and Blue) color subpixels, the technology utilizes a yellow fourth color subpixel (RGBY) which Sharp claims increases the range of displayable colors, and which may mimic more closely the way the brain processes color information.

Shadow mask

shadow-maskbeam-shadowing mask
The modern RGB shadow mask technology for color CRT displays was patented by Werner Flechsig in Germany in 1938.
At the time, a number of systems were being proposed that used separate red, green and blue signals (RGB), broadcast in succession.

Gamma correction

gammagamma curvegamma compression
When properly managed, these values are converted into intensities or voltages via gamma correction to correct the inherent nonlinearity of some devices, such that the intended intensities are reproduced on the display.
In the process of rendering linear raw data to conventional RGB data (e.g. for storage into JPEG image format), color space transformations and rendering transformations will be performed.

Hue

colorcolor huecolors
The difference in the signals received from the three kinds allows the brain to differentiate a wide gamut of different colors, while being most sensitive (overall) to yellowish-green light and to differences between hues in the green-to-orange region. When the intensities are different, the result is a colorized hue, more or less saturated depending on the difference of the strongest and weakest of the intensities of the primary colors employed.
Preucil describes a color hexagon, similar to a trilinear plot described by Evans, Hanson, and Brewer, which may be used to compute hue from RGB.

Portable Network Graphics

PNG.pngPNG image
Increased shading has been implemented in various ways, some formats such as .png and .tga files among others using a fourth greyscale color channel as a masking layer, often called RGB32.
PNG supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colors), grayscale images (with or without alpha channel for transparency), and full-color non-palette-based RGB or RGBA images.

Additive color

additiveadditive colouradditive mixing
The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors.