I have a card Asrock radeon rx 5700xt taichi and a monitor AOC AG273QCX 27
when I run the HDR with the games some games are very bright and some games the colors are gray and also I feel instability in the colors sometimes
Try new adrenalin 20.9.2 driver. AMD informed that 20.9.2 driver fixes the issue of washed out hdr color in the driver release note.