I experienced the same today on a 2019 13-inch MacBook Pro. Only saw the process in htop with high CPU usage stuck at the same value for several minutes, but not showing in Activity Monitor. I quit and started htop again and it appears to be gone. If I filter for colorsync it shows a number of processes, among them colorsync.display, with CPU usage at 0%.
This may just be a process stuck that gets stuck in htop for some reason.