With permission from Mike McClung, who is the philatelist who has identified and published the various shades by year and rarity factor in "The Chronicle", here are some of the shades of the A25 #65 3c 1861 stamp. I've purchased several covers from Mike, and he has labeled the back of the cover with the shade-- I now have 17 of the 48 non-pink shades for the #65 stamp and I thought I'd scan them, and post.
I've scanned them with a Epson Perfection V500 scanner, with auto exposure turned down as far as possible, and the pictures here, when reduced to the size of a stamp (at 1200, it was 8% of the size), look pretty close-- a little bright, but the colors are VERY close, at least on my monitor.
I don't make any suggestions here that I've done any of the work in finding the colors, and I highly suggest that anyone who is interested in the 3c 1861 join the US Philatelic Classics Society. For your membership fee, you'll receive a quarterly copy of "The Chronicle" and every quarter there are articles on: Stampless period, 1847, 1851-57, 1861, 1869, Officials, Essays & Proofs, and others.
Mike McClung is the editor of the "1861 Period" chapter, and his shades work and other work has been published in this chapter for around 15 years now.
You can always find the back issues, with the shades, rarity factors, and his methods, on the USPCS.org website. The current issue of "The Chronicle" has the first published pictures of all of the "pinks", and it's just great.
Also, I make no guarantee that any of the shades I'm posting here are accurate. One can only really see true color on a stamp with the stamp in hand, in natural light.
On covers I've collected and purchased from Mike, here are the shades he identified:
From 1861, Bright Rose (listed in Scott), Rarity Factor = 3
From Late 1861, Carmine Rose (Listed in Scott), RF=3
From Early 1862, Red Rose (Listed in Scott), RF =2
From Mid 1862, Rose (Listed in Scott), RF = 1
From Early 1863, Lake Rose (Listed in Scott), RF = 1
From Early 1863, Dull Lake Rose (unlisted), RF = 3
From Early 1863, Pale Lilac Rose (unlisted), RF = 3
From Mid 1863, Pastel Rose (unlisted), RF =3
From Mid 1863, Deep Rose (unlisted), RF = 2
From Late 1863, Reddish Claret Rose (unlisted), RF = 5
From Early 1864, Claret Rose (unlisted), RF = 5
From Mid 1864, Brick Red (unlisted), RF = 8
From Early 1865, Pale Rose Red (unlisted), RF = 2
From Early 1865, Dull Red (Listed in Scott), RF = 1
From Early 1865, Rose Brown (unlisted), RF = 4
From Mid 1865, Pale Rose Brown (unlisted), RF = 3
From Mid 1866, Dull Rose (unlisted), RF = 1
I don't know if these shades have been listed anywhere else on the web at this point, and I thank Mike for allowing me to post them here.