So I've been thinking a bit about dragons, and what themes the various types embody. They're more than just a colour and a damage type, so here's what I came up with. I might try these out in my own games. It's just a mild extrapolation on what's there, nothing new really, and YMMV.
Red -- these guys are just all about the damage. Fire damage. Lots of fire. And damage. Even balrogs are afraid of ancient reds.
Blue -- rather than desert dwellers, what if these were 'storm' themed dragons with powers of thunderstorms and lightning? They live in high mountaintops.
Green -- these are pretty much as we known them -- swamps and poison and charm. Insidious manipulators.
Black -- darkness, horror ambushers. I'm thinking Aliens. Leaning into the horror.
White -- ice lairs scream illusion to me. Images reflected off the ice, reflected light, illusions.
Red -- these guys are just all about the damage. Fire damage. Lots of fire. And damage. Even balrogs are afraid of ancient reds.
Blue -- rather than desert dwellers, what if these were 'storm' themed dragons with powers of thunderstorms and lightning? They live in high mountaintops.
Green -- these are pretty much as we known them -- swamps and poison and charm. Insidious manipulators.
Black -- darkness, horror ambushers. I'm thinking Aliens. Leaning into the horror.
White -- ice lairs scream illusion to me. Images reflected off the ice, reflected light, illusions.