I posted this a while back on .net, but it quickly went off topic and I never got many answers. I hope this is the right section of the site to put this on.
I've noticed that a lot of main protagonists in the DT series and related books have blue eyes. These include Roland, Jake, Jack Sawyer (The Talisman), several members of the Losers club (It), King himself, and some others that I can't remember. Does anyone else think that blue eyes are somehow significant, like a sign that someone is an agent of the White?