Purple / Blue / Green kind of hues look amazing... but auroras are not just limited to those colors.

Would love to see red, orange, yellow, etc.

From what I can tell, textures are alpha channels only, no color. So there must be a way to mod the game to make tons of different colored auroras...

...but there are Red, Yellow, Orange auroras in the game, no need for a mod

Oh LOL oops... I haven't seen them yet