CIE 1931 xy chromaticity diagram showing the gamut of the Adobe RGB color space and location of the primaries. The D65 white point is shown in the center.
In Adobe RGB, colors are specified as (R,G,B) triplets, where each of the R, G, and B components can have values between 0 and 1. When displayed on a monitor, the exact chromaticities of the white point (1,1,1), the black point (0,0,0), and the primaries (1,0,0) etc.] are specified. Moreover, the luminance of the monitor should be 160 cd/m2 at the white point, and 0.5557 cd/m2 at the black point, which implies a contrast ratio of 287.9. The environment of the monitor is illuminated at 32 lx.
Like in sRGB, the RGB component values in Adobe RGB are not proportional to the luminances. Rather, a gamma of 2.2 is assumed, without the linear segment near zero that is present in sRGB.
