By best practice go to, is to hold up a Pantone book near monitor and match that way. Yes method yet, since when referencing visually from a digital file of any sort, it’s relying on your own monitor settings (based on what it’s reading) to determine what the color is. Photoshops color picker and Illustrators color converter are the same. Since you mix inks based the pms number as a guide, you can’t go wrong matching to a pantone color from what you are looking at.