It's funny: when I read monitors I thought about display monitors. And the same applies there: you can buy monitors that can be calibrated but surrounding ligh

It's funny: when I read monitors I thought about display monitors. And the same applies there: you can buy monitors that can be calibrated but surrounding light makes each monitor and each setup different. So graphic designers do the same: they know the display monitor in the room. And each end user will see the designed colors a little different, but it doesn't matter.