In response to a question on another forum, though you'd like to see this here as well....
Currently there are only a few proven rainbow boa Morphs.
Hypo (Hypomelanistic) a recessive trait in Brazilian Rainbow Boas that results in a very light colored animal with no black and a yellow to peachy color.
Anery (Anerythristic) A recessive trait in Brazilian Rainbow Boas that results in a dark animal with no red and white crescents.
Both Brazilian and Colombian have their own strain of Albino. Not "proven" yet in BRB biut I believe they are being produced in Colombians.
Ghost - A recessive trait in Colombian Rainbow Boas. results in light gray CRB.
Several traits in the proving stages:\
Pearl - Full crescent color side markings - believed to be either recessive or line bred.
Candy Stripe - Brand new trait in Brazilian Rainbow Boas resulting in a hypo colored fully striped animal. Possibly a co-dominant trait.
Zebra striped - a stripe that came out of the Pearls where the dorsal markings blend with the lateral markings.
Aby (Aberrant) line - a third line of stripes where the side markings are conjoined into stripes.
I'm sure I've missed some, feel free to add to the list....