6️⃣9️⃣4️⃣2️⃣0️⃣

I don’t know if this is still the case, but before Wayland came along, colord was the service that applied ICC profiles to a display. I’m not sure it still works on Wayland though. I feel like DisplayCal should be able to disable it, but you can too:

sudo systemctl stop colord

That’s when you have to scrape off the excess with a trowel.