Symmetry in Ice and Fire.
BuzzFeed has a post about little details in Game of Thrones.
Something in that piece which I had not previously noticed was the symmetry in two scenes from different episodes.
On the left there’s Jon Snow from S06E09 “Battle of the Bastards” and on the right is Daenerys Targaryen from S03E10 “Mhysa”.
Both of them appear at the center of what look like human cyclones. In the context of the series, the color scheme for Jon suggests ice as the one for Daenerys suggests fire.