How to manage colour in After Effects to get precisely a desired colour in h264 output
Since I cannot use hyperlinks in comments, here is the gist of my research:
This answer on a reddit post suggests, that the reason for the color-shift is the way illegal and legal colors are handled. So maybe the &quot;broadcast colors&quot; effect can help limit the color-range to the legal range? I'd recommend giving that a quick shot.
If that doesn't work, it should certainly do the trick to use Resolve and select video-levels instead of data-levels and encode the 4444 to h264 from there.
Please do report back and good luck!