Note that the RGB color may be premultiplied, hence saving the additional multiplication before RGB in the equation above.

This mode devotes 5 bits for every primary RGB color ( 15-bit RGB ) plus a remaining bit as the " alpha channel ".

Cyan printing ink can be more saturated or less saturated than the RGB secondary cyan, depending on what RGB color space and ink are considered.

Process cyan is not an RGB color, and there is no fixed conversion from CMYK primaries to RGB.

Separating RGB color signals into luma and chrominance allows the bandwidth of each to be determined separately.

Previous schemes for color television systems, which were incompatible with existing monochrome receivers, transmitted RGB signals in various ways.

The colors are chosen from the 24-bit RGB color space.

Each image can have its own 256-color palette, so that the logical screen can be tiled with multiple smaller images, which together can use any selection of colors from the 24-bit RGB color space.

This is the brightest color indigo that can be approximated on a computer screen — it is a color located between the web color blue and the color violet on the RGB color wheel.

In an RGB color space, spectral indigo and violet must be approximated by purples, that is, by mixing a little red with a lot of blue.

It is impossible to represent spectrum indigo exactly on a computer screen, because true spectrum indigo is outside the color triangle or gamut of the RGB color space defined by the monitor primaries.

While displays lit with white LEDs usually have a poorer color gamut than CCFL lit displays, panels lit with RGB LEDs have very wide color gamuts.

Most pixel-based image editors work using the RGB color model, but some also allow the use of other color models such as the CMYK color model.

For some applications, a single alpha channel is not sufficient: a stained-glass window, for instance, requires a separate transparency channel for each RGB channel to model the red transparency, green transparency, and blue transparency.

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.

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.

Before the electronic age, the RGB color model already had a solid theory behind it, based in human perception of colors.

RGB is a device-dependent color model: different devices detect or reproduce a given RGB value differently, since the color elements ( such as phosphors or dyes ) and their response to the individual R, G, and B levels vary from manufacturer to manufacturer, or even in the same device over time.

Color printers, on the other hand, are not RGB devices, but subtractive color devices ( typically CMYK color model ).

This article discusses concepts common to all the different color spaces that use the RGB color model, which are used in one implementation or another in color image-producing technology.

The RGB color model is additive in the sense that the three light beams are added together, and their light spectra add, wavelength for wavelength, to make the final color's spectrum.

The RGB color model itself does not define what is meant by red, green, and blue colorimetrically, and so the results of mixing them are not specified as absolute, but relative to the primary colors.

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.

The additive RGB model and variants such as orange – green – violet were also used in the Autochrome Lumière color plates and other screen-plate technologies such as the Joly color screen and the Paget process in the early twentieth century.

One common application of the RGB color model is the display of colors on a cathode ray tube ( CRT ), liquid crystal display ( LCD ), plasma display, or organic light emitting diode ( OLED ) display such as a television, a computer ’ s monitor, or a large scale screen.

In any case, nonlinearity ( whether gamma-related or not ) is not part of the RGB color model in itself, although different standards that use RGB can also specify the gamma value and / or other nonlinear parameters involved.

Photographic digital cameras that use a CMOS or CCD image sensor often operate with some variation of the RGB model.

A color in the RGB color model is described by indicating how much of each of the red, green, and blue is included.

Electric ultramarine, as opposed to the pigment ultramarine shown above, is the tone of ultramarine that is halfway between blue and violet on the RGB ( HSV ) color wheel, the expression of the HSV color space of the RGB color model.

In the RGB color model, the secondary color created by mixing the red and blue primaries is called magenta or fuchsia, though this color differs in hue from printer's magenta.

However, if this pixel uses premultiplied alpha, all of the RGB values ( 0, 1, 0 ) are multiplied by 0. 5 and then the alpha is appended to the end to yield ( 0, 0. 5, 0, 0. 5 ).

This is because up to 2 / 3 of the backlight power of LCD and rear-projection displays are lost to the RGB stripe filter.

For example, when an ordinary RGB digital image is compressed via the JPEG standard, the RGB colorspace is first converted ( by a rotation matrix ) to a YCbCr colorspace, because the three components in that space have less correlation redundancy and because the chrominance components can then be subsampled by a factor of 2 or 4 to further compress the image.

On decompression, the Y ' CbCr space is rotated back to RGB.

In the above lines of text, when the orange circle is shown, all the text in the frame is rendered using Cleartype ( RGB subpixel rendering ); when the orange circle is absent all the text is rendered using normal ( full pixel greyscale ) anti-aliasing.

These colors form the standard for cloth, and there is no perfect way to convert them to RGB for display on screen or CMYK for printing.

Note that due to the reduced number of colors in the image, there are obvious display issues. GIF is palette-based: the colors used in an image ( a frame ) in the file have their RGB values defined in a palette table that can hold up to 256 entries, and the data for the image refer to the colors by their indexes ( 0 – 255 ) in the palette table.

Although GIF is not often used for truecolor images ( as it was not designed for that purpose ), there are at least two methods that can generate 24-bit RGB truecolor images when decoded correctly.

* RGB-LED: Similar to the WLED array, except the panel is lit by a full array of RGB LEDs.

RGB signal formats are often based on modified versions of the RS-170 and RS-343 standards for monochrome video.

An RGB color space is any additive color space based on the RGB color model.

It is important to note that the RGB color model is merely a convenient means for representing color, and is not directly based on the types of cones in the human eye.

Constructing a full color image from a Bayer sensor requires demosaicing, an interpolative process in which the output pixel associated with each photosite is assigned an RGB value based in part on the level of red, green, and blue reported by those photosites adjacent to it.

This form of Y ′ CbCr is based on an RGB model that more closely fits the phosphor emission characteristics of newer CRTs and other modern display equipment.

In fact, when Y ′ CbCr is designed ideally, the values of K < sub > B </ sub > and K < sub > R </ sub > are derived from the precise specification of the RGB color primary signals, so that the luma ( Y ′) signal corresponds as closely as possible to a gamma-adjusted measurement of luminance ( typically based on the CIE 1931 measurements of the response of the human visual system to color stimuli ).

A color wheel based on RGB ( red, green, blue ) or RGV ( red, green, violet ) additive primaries has cyan, magenta, and yellow secondaries ( cyan was previously known as cyan blue ).

This development resulted in a TV lighting system ( based on RGB LED ) that reproduces the color and brightness of the content displayed on the TV screen.