There are probly as many diffrent types of rats as there are rats in this world. Here are the types that I know about and that I'm able to discribe. If you know of any other kinds of rats or have a picture that fits one of the kinds that I have listed and don't mind me using the picture. Send an email to me.
Dumbo
Agouti- A light black color.
Hairless
Velveteen
Rex
Standard
Tailess
Black/midnight
Blue
Blue Agouti- lighter version of the blue.
Blue Point Siamese
Chocolate
Cinnamon Pearl- Pearl color with cinnamon highlights
fawn- tanish color, not solid.
himalayan- white with light black points on its nose, base of tale, and ears.
merle- Grey with black highlights.
Pearl- another term for white or off white.
Siamese- like the himalayan, mostly.
silvered black
silver fawn- lighter version of fawn.
Black-eyed white
Capped/Hooded/Masked
Berkshire- white belly.
Dalmation
Blaze- White marking on nose.
Husky