Originally Posted by
Ziatrix
One thing that I'm surprised about is how nobody's really looked closely at Tiamat's colouration. The concept art is actually accurate, which also helps point out which dragon is Ratatoskr, if the horns aren't enough.
Tiamat actually has green on her - the only issue is that for all intents and purposes it looks as if her main colour has become, well, discoloured for a lack of better word. If I knew how to post images, I'd definitly put one up, otherwise if you want confirmation, her tail is the best place to look at, along with her wings.
Also, having a closer look at Tiamat and the various things impaling her is quite disturbing.