Obviously you need to get some practice to learn what the numbers mean, but because they are related to human visual perception rather than to the physical deta

Obviously you need to get some practice to learn what the numbers mean, but because they are related to human visual perception rather than to the physical details of the display device, they are much easier to learn than RGB coordinates. You should give it a shot; you should be able to get the basic idea with just a few minutes of effort, and if you try working with these seriously for a few days you'll be set.