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%. 

[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/g7ZSu.png

This may just be a process stuck that gets stuck in `htop` for some reason.