Get precise spot colors using lab values

Last updated on Oct 27, 2025

Learn how to use Lab values to achieve precise and consistent Spot Colors in the designs.

Some predefined Spot Colors from the TOYO, DIC, and HKS libraries are defined using the lab values. For backward compatibility with previous versions of Illustrator, colors from these libraries also include CMYK definitions. The Swatches panel allows you to choose whether Illustrator uses the Lab or CMYK values to display, export, and print spot colors

When used with the correct device profiles, Lab values provide the most accurate output across all devices. If color management is critical to the project, Adobe recommends displaying, exporting, and printing Spot Colors using the Lab values.

Note

To improve on-screen accuracy, Illustrator automatically uses Lab values if Overprint Preview is enabled. It also uses Lab values when printing if you’ve selected Simulate for the Overprints option in the Advanced area of the Print dialog box.

Select Window > Swatches.

In the Swatches panel, select More options > Spot Colors.

In the Spot Color Options dialog box, select Use Lab values specified by the book manufacturer.

The Spot Color Options dialog box is displayed on the screen showcasing the options to choose color definitions for manufacturer supplied Spot Colors.
In the Spot Color Options dialog box, select Use CMYK values from the manufacturer’s process books to ensure Spot Colors match those in earlier Illustrator versions.

Select OK.