Board Thread:False Info and Speculative Discussion/@comment-4091815-20170918183706/@comment-26879545-20171024123958

Peter got his blue eyes before he started killing the people behind the fire. Jeff stated in an interview that his eyes turned blue some time in his past before he killed Laura.

In Visionary, we see his eyes are yellow, so it's some time after that and before the Hale fire that his eyes became blue.

Source:  x

The specific question is:

whatthehale27: Are Peter’s eyes blue because he killed Laura? Or is it something in his past we haven’t seen yet?

Davis: His past.