wide-gamut RGB color space

{{Short description|Large gamut of color space developed by Adobe}}

{{Use American English|date=March 2021}}

{{Use mdy dates|date=March 2021}}

Image:CIExy1931 AdobeWGRGB.png is shown in the center.]]

The wide-gamut RGB color space (or Adobe Wide Gamut RGB) is a color space developed by Adobe Systems, that offers a large gamut by using pure spectral primary colors.

{{cite web

| url = https://babelcolor.com/index_htm_files/A%20review%20of%20RGB%20color%20spaces.pdf

| title = A Review of RGB Color Spaces ...from xyY to R'G'B'

| first = Danny

| last = Pascale

| access-date = 2010-02-12}}

It is able to store a wider range of color values than sRGB or Adobe RGB color spaces. As a comparison, the wide-gamut RGB color space encompasses 77.6% of the visible colors specified by the CIELAB color space, while the standard Adobe RGB color space covers just 52.1%Adobe RGB color space and sRGB covers only 35.9%.Rec. 709

When working in color spaces with such a large gamut, it is recommended to work in 16-bit per channel color depth to avoid posterization effects. This will occur more frequently in 8-bit per channel modes as the gradient steps are much larger.{{cite web

| url = http://www.adobe.com/digitalimag/pdfs/phscs2ip_colspace.pdf

| title = The role of working spaces in Adobe applications

| first = Andrew

| last = Rodney

| access-date=2010-02-12}}

As with sRGB, the color component values in wide-gamut RGB are not proportional to the luminances. Similar to Adobe RGB, a gamma of 2.2 is assumed, without the linear segment near zero that is present in sRGB. The precise gamma value is 563/256, or 2.19921875.

The white point corresponds to D50.

The chromaticities of the primary colors and the white point are as follows:

class="wikitable"
Color ! CIE x ! CIE y ! Wavelength
Red | 0.7347 | 0.2653 | 700 nm
Green | 0.1152 | 0.8264 | 525 nm
Blue | 0.1566 | 0.0177 | 450 nm
White point | 0.3457 | 0.3585