Is it okay to drop sugestions? I had this idea from a draconic mash up, I call it Dracomera

its a stupid name but hear me out.

Well, what happens when a Red Dragon, long ago, instilled his bloodline in a lineage of Green Dragonborn, then a Blue Dragon goes, and mates with this lineage in the present age. What have you got?

A Green Dragonborn (Poison Breath, Resistance) with Red Draconic Bloodline, as a Sorcerer (Fire breath and resistance) who is also half blue dragon (Lightning breath and resistance)

Well that is a lot of dragon for one person. I bet his scales must be quite weird.