You can turn the color picker into an application by following the guide here:
http://hints.macworld.com/article.php?story=20060408050920158
From the guide:
Simply fire up AppleScript
(Applications -> AppleScript Editor)
and enter this text:
choose color
Now, save it as an application (File
-> Save As, and set the File Format pop-up to Application), and you're
done
