300px|thumb|CIE 1931 xy chromaticity diagram showing the gamut of the wide-gamut RGB color space and location of the primaries. The D50 [[white point 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.
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% and sRGB covers only 35.9%.
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.
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
|-
| style="background-color: color(rec2020 );" | Red
| 0.7347
| 0.2653
| 700 nm
|-
| style="background-color: color(rec2020 );" | Green
| 0.1152
| 0.8264
| 525 nm
|-
| style="background-color: color(rec2020 );" | Blue
| 0.1566
| 0.0177
| 450 nm
|-
| style="background-color: color(rec2020 );" | White point
| 0.3457
| 0.3585
|}