If you're putting the photos up for sale then don't give up the day job.
Oh, and my skintone is pantone ref 155 or thereabouts (well, it is on my screen
).
You probably already came across this website -
http://www.seoconsultants.com/css/colors/conversion/ - which gives spot colour/pantone conversions. It's probably no good to you whatsoever, as it's perfectly evident that I don't understand what the thread's about, but it seemed marginally relevant...