1 (red) is the top tail fin
2 (green) is the lower tail fin
The Dorsal and Anal fins are marked. Unless there is a 3rd fin hidding behind the dorsal fin then he's a double tail.
He's a great looking double tail, very even and the body isn't all stumpy like some. And I believe his color would be described best as being "Iridescent" blue/green.
He looks healthy and happy, and I'm glad he's moving around a lot more!!