You see, without knowing the parents, you just don't know the exact genetics, but you would be able to tell by looking at him if he was a leatherback (reduced scales on back making it smooth), hypo (hypomelanistic, meaning bred without dark pigmentation giving them pure white bellies and 20 clear nails), translucent (bred without white pigmentation giving their bellies a bluish see through effect and solid black eyes), silk back (no scales, just smooth "skin") or just a normal (normal scales, normal colors)
Dragons can have multiple traits listed, such as a hypo leatherback or a translucent silk back.
All of the types listed can be of any color phase, which each individual breeder gives a particular name to their line of a certain color (ie Chris Allen red)
You will hear many different names for colors (citrus, rainbow, physco orange, super citrus, etc, which is the name the breeder gave them, but the color phases are normal (grey, tan, brown with hints of black and sometimes yellow and orange), orange, red, yellow, and white.
A full out normal would be a normal scaled, normal colored, which is what most pet stores have. You usually have to get a dragon from a breeder or reptile expo to get a particular morph. Every once in a while one will end up in a petstore. Another chance of getting a morph is getting one from the classifieds. Normals can still be colorful, they just don't have the genetic bloodlines behind them to use for breeding.
Any color morph can be one or multiple of the first traits I listed. (ie orange hypo leatherback)
You will also hear the term "het" thrown around, like het for hypo or het for trans. This is most likely for breeding purposes, as it means that specific dragon carries the gene, but does not show the trait. The percentages are based on the parents and grandparents. 1parent=50%het, 2parents=100%.
So...you don't know his genetics, but you can take a guess of what he is.
If I had to guess, I would say he's probably a normal with nice color, or even possibly some citrus. Either way, he's pretty! If you don't plan on breeding, it doesn't really matter. He's not a leatherback, though. Hopefully I didn't confuse you! Lol!