I don't think it's solid (fine) orange- there are lots of those at my Petsmart. White isn't that hard to find, really. I got lucky with my white boy. Green, and albino and true purple, as mentioned in this thread.
Black melanos with no iridescence, true purple, as far as green I guess you all are talking about an emerald sort of color because green is a natural color in bettas.. most people would call it blue/turquoise.
Albinos yes but they aren't a color.. its a genetic deformity. Albinism by definition is a lack of pigmentation which means no color. The fact that you don't see albino bettas is a good thing because they are usually rife with genetic issues.
*Be smart.. Do your research!!*[/COLOR][/FONT]
I'm no good with this betta coloration thing xD In snakes, albino is considered a morph, so I simply assumed they were in fish, too. I bow down before your might, 1f2f ^_^ And yeah, we had a member on here before with an albino betta that was blind. Don't know if he made it or not, as she stopped frequenting.