The colors can be the 'same' under a specific illumination condition. Standards that help make sure prints look like your screen specify the illumination condit

The colors can be the 'same' under a specific illumination condition. Standards that help make sure prints look like your screen specify the illumination condition of viewing, and then demand the spectrum radiating from the screen and paper 'look' the same. Often this is a daylight lamp shining on the paper with a specified intensity, in an otherwise dark room (I believe) compared to watching the screen in a specific ambient light (again daylight with a given intensity).