The picture it kind of looks like one of @Chard56 's bettas, who is a member on here.
As for the color name it really is that difficult sometimes, some breeders like to come up with their own name for patterns and also there are a lot more color types coming on the scene recently that has made things a bit more confusing. :/

 

It is one of his betta's. It does seem a little difficult but I've had luck with the ones I've been searching. I mean, Reggie is a "Galaxy Fancy Dragon" so there's that.

 

If it was me I would just do searches for all the names just so I don't miss anything. lol

 

That's what I've been doing lol, I'm hoping my LFS might have that color eventually. They restock on Wednesday so i can only imagine what they'll have.

 

I've seen a couple of those guys in one of my local fish stores. My brother-in-law calls them "Turquoise Red-wash"

 

hmmm I can't think of an actual name for them. I guess you could call it a blue dragon with red fins, but even that term probably wouldn't be truly correct. To my knowledge, dragons are technically silver or white bodied fish, but some consider them any color of fish with thick, shiny scales. I think it's probably a blue/red bi-color. A lot of the fish colored like that on aquabid are labelled as Blue Red HMPK or some crazy made up name like "Tahitian Gator Mouth!!" lol

 

bicolor or multicolor

 

Blue/red bicolour. Cant tell what type of blue it is since the photo is overexposed so we cant get a true representation of colour, but if I were to guess I say turquoise or metallic turquoise. Definitely not dragon, it has no thickening of the scales.
Nice looking fish though

 

Nowadays ppl would call them red . . . . (Body color). . . - red green, red turquoise, etc. meaning it has red fins and whatever body color. Unless the breeder gives it a fancy commercial name, of course. It's basically an irid x red combo.

Yrs ago ppl would call them multi/bi colors. But since the dragons appeared, ppl have been using "red (body color)" to indicate it has red fins.

Hope that simplifies your search.

 

Green Red Butterfly

Green Red Butterfly is what it is called. With the Green body and two tone finnage. An ideal butterfly would have more of an equal amount of both colors. When you look at someone's feed back you also need to check the feedback of the person giving that feedback. Many times someone will post bad feedback out of spite or assumimg they got a bad deal before even contacting the seller. They can also leave feedback on each item they purchase so if they buy 6 or 8 Bettas they can leave feedback on each one. For instance, I have 15 bad feedback. They are from 8 people out of 670 total feedback comments for a positive rating of 97.4 percent from October 2010 to the present. 2 of those are from people that emailed me when I was out of town and didn't reply for a whole 36 hours. Others assume their email was sent to the right place and that I even got it. You can't please everyone but I try. Some people are just miserable and look for a reason to try and make someone else look bad.