Jon with White Hair [spoilers extended]

I gonna try and keep it brief, I keep seeing these fan arts of Jon snow with white hair and scars around his eyes, I’ve seen the show currently reading the books and don’t really care about spoilers. I was just curious if after he got all stabby stabby and super not alive if his hair turned white. I was also wondering how he got the scars around his eyes but I assume I will told given that answer as I continue reading.