Here are some of the rat varieties that are out there. Color wise I may be missing some I'm sure. If anyone wants to add on to the list just send me an email.

Colors
     Agouti
     Amber
     American Blue
     Black
     Blue Agouti
     Beige (Black + RED)
     Black-Eyed White
     Blue Beige (Russian Blue + RED)
     Champagne (Black + PED)
     Chinchilla
     Chocolate
     Cocoa
     Cinnamon (Agouti + Mink)
     Cinnamon Pearl
     Fawn (Agouti + RED)
     Lavender
     Lilac
     Mink
     Merle
     Pearl
     Pink-Eyed White
     Platinum
     Platinum Agouti
     Platinum Pearl
     Powder Blue
     Russian Blue
     Russian Blue Agouti
     Russian Fawn (Russian Blue Agouti + RED)
     Russian Silver (Russian Blue + Blue)
     Russian Dove (Russian Blue + Mink or Chocolate)
     Roan
     Sky Blue

Color Points
     Himalayan
     Black-Eyed Himalayan
     Seal Point Siamese
     Russian Blue Point Siamese
     Blue Point Siamese
     Mink Point Siamese
     Black-Eyed Siamese
     Burmese
     Sable Burmese
     Wheaten Burmese

Markings
     Self
     Berkshire
     English Irish
     Irish
     Banded
     Varigated
     Dalmatian
     Hooded
     Bareback
     Capped
     Masked
     Blazed
     Cap/Stripe
     Patched
     Downunder Berkshire
     Downunder Hooded
     Downunder Varigated
     Essex
     Baldie
     Badger
     Possum
     Collared
     Turnpin

Coat Types
     Standard/Smooth
     Rex
     Velveteen
     Double Rex
     Hairless
     Satin
     Harley

Ear Types
     Standard
     Dumbo

Eye Types
     Black
     Ruby
     Pink
     Oddeye

Tail Types
     Standard
     Tailless

Body Types
     Standard
     Dwarf