One of my favorite aspects of this Dragon is the blue lining that appears on his body. I've always fancied them as having a bioluminescent property whenever he exerts his powers/abilities.
This take on them is pretty much spot on to what that looks like in my head. Very intense, and very, very blue.

Art done by  GlowingSpirit - Absolutely incredible job on their part. Check em' out.
Character  Sky