Board Thread:False Info and Speculative Discussion/@comment-25841096-20160307071828/@comment-26879545-20160308183554

Omegas: Yellow eyes

Betas: Yellow eyes

Alpha: Red Eyes

The only way for a werewolf to have blue eyes is if they've taken in innocent life (or if they're the Beast of Gevaudan). This was explained in the episode Visionary.

Scott bit Liam. Liam turned into a werewolf. As such, Scott is his Alpha and Liam is his Beta. If Liam leaves Scott's pack and becomes a lone wolf, he'd be an Omega. If he doesn't kill an innocent, he'll have the normal yellow eyes associated with werewolves.

During S3a, Scott's eyes flashed red at times before returning to yellow. They weren't permanently red. He didn't become an Alpha until he broke the Mountain Ash barrier that Jennifer threw down.