Colortargets is a plugin/script for Adobe Illustrator for printers to quickly create targeted color charts for matching colors on printers.
Perfect for matching customer supplied samples or spot colors on different media even when you don't have the correct color profiles.
Using the Colortargets select a target color like CMYK color as a starting point, then the Colortargets will generate a number of swatches near that color.
Print out the targeted color chart and choose the best match. You start checking the result then repeat the process using finer settings to zero.