Okay, I retract my greenish-gray hue and claim that now I am leaning towards a thinking process saying that it looks like a strong golden hue, still with a hint of green.
Show me all the pictures you like; I still stand that there's a trace of green in his hair, and that includes when I saw him on the original PSone, PStwo, my PC and my Mac, not to mention the various televisions that accompanied them.
Oh well...it doesn't matter. It's all about color recognition - people perceive some shades of color differently than others, and obviously this is one of those cases.
...Just as long as no one tries to tell me that Glenn/Frog from Chrono Trigger and Glenn from Chrono Cross are interconnected!