I am working on a video for the web only. It is going to be on a webpage (never on broadcast), delivered as an h264 file. The web page background is hex code FFF1E5 (RGB 255, 241, 229). My background colour in After Effects is a solid with colour FFF1E5. How do I generate an h264 video file with a background precisely this colour. Not a little bit off. Exactly this colour. Because I've tried adjusting colour Working Space in Project Settings until I'm 0000FF in the face...
The link supplied in the highest rated answer in this similar question is broken.
My usual workflow is:
export as ProRes 422 (or 4444 - same problem) from After Effects CC2020
Convert to h264 in Media Encoder CC2020