From A Wiki of Ice and Fire
Cobalt is a bluish gray metal.
The she-dragon ridden by Prince Daeron Targaryen, Tessarion, had dark cobalt wings, while the scales of her claws, crest, and belly were a bright beaten copper. Her flames were cobalt blue in color as well.
Brienne of Tarth owns a dented deep blue cobalt suit of armor which earns her the sobriquet of "Brienne the Blue".
- ↑ Fire & Blood, The Dying of the Dragons - The Blacks and the Greens.
- ↑ Fire & Blood, The Dying of the Dragons - The Red Dragon and the Gold.
- ↑ A Clash of Kings, Chapter 22, Catelyn II.