This beautiful canvas art presents the sigil of House Starks and Jon Snow with blue eyes. As in the series Jon Snow never became a white walker. But in this picture it clearly shows that Jon Snows one eye is blue, its because it shows only half of his face. This might be the reflection that this picture is giving to our minds as readers. That Jon Snow sees the Blue flame somewhere near him. All of this paints a picture where Jon Snow spotted Arya near Viserion as she was trying to make her way to the godswood, and to help his little sister out, Jon decided to potentially sacrifice himself by distracting the dragon so Arya could make it to the weirwood tree in time to kill the Night King.