Hi--
Jack Daley emailed me last night to give me a link to a website he has been working on-- it not only shows the shades of the 1861 3c stamp, but is a great resource on color, and understanding what makes the shades. I told him that I'd post the site, and he was happy for me to do that:
http://3cent1861.com/Hope that if you're interested in this stamp that you check it out, and if you get a chance, send Jack an email to thank him for his efforts. Great website-- Ray