This script will generate a legend of rectangles  with RGB, CMYK, HEX code and Grey Scale Values for every swatch in the main swatches palette.
 
Once Downloaded place this script in this location on your:
PC
PROGRAM FILES/ADOBE/ADOBEILLUSTRATOR/ PRESETS/[LANGUAGE]/SCRIPTS
 
MAC
/APPLICATIONS/ADOBE ILLUSTRATOR/PRESETS/[LANGUAGE]/SCRIPTS