Its not the lighting, because I've inspected it up close under the same lighting and posture before and after training. Its the skin itself that changes tint to a bluish black.
Mine do this too, but usually it's when I get punched in that eye during training...
My eyes change color slightly depending on my mood. I think some eyes just do this.
My eyes seem to do this also.
Cut the tiny testicles off of both of these rich, out-of-touch sumbiches, crush kill and destroy the Electoral College, wipe clean from the Earth the stain of our corrupt politicians, and elect me as the new president. --Vash