Since Adobe removed most built-in Pantone libraries in 2022, you now have two primary ways to access them: the official extension or manual workarounds using legacy color book files . 1. Official Method: Pantone Connect Extension
Because of the subscription model, many designers use these manual methods to "download" colors back into Illustrator: download pantone colors for illustrator
This is the recommended way to access up-to-date Pantone libraries directly within Illustrator. : Pantone Connect Since Adobe removed most built-in Pantone
If you have access to an older version of Illustrator (v27.0 or earlier), you can manually copy the color book files to the newer version. Locate Files download pantone colors for illustrator