webm has the same problem conceptually (evil tech giant forcing a new standard on the internet nobody asked for under the guise of "open source")

however, what it *is* is just Matroska. so I kinda like it

1 is a little noisy but it looks full chroma without color pollution at least, could be much worse

Bluesky will transcode with the color at 1/4 resolution. nearest-neighbor upscaling 2x or 4x will prevent color spill. also important with video, for the same reason. and it'll preserve the pixels when it's scaled and stretched around