[css-color-4] sRGB doesn't really use 80 cd/m^2 white luminance #3435
Description
The definition of sRGB, which is also given in css-color-4 says that the white luminance level is 80 cd/m^2.
In practice the level is typically higher, often significantly higher, like the 160 cd/m^2 used by Adobe RGB (1998).
This impacts the black level, which is raised due to flare, when black point compensation is in use.
This also affects compositing SDR content (such as most web pages) onto HDR content (video, images), which is often done for information overlays and mixed HDR/SDR content in general. The result looks very dull if 80 cd/m^2 is used.
Is there a more modern, reference-able recommendation to use a higher white level for sRGB?