Re: the hair, maybe you need to alter the colour of the skullcap as well?? (guessing here, I haven't played with P5 hair too much, it hogs too much processor!) Apart from that, it's a nice-looking man. The eyes seem a little off though, maybe due to the strong reflection in them, which seems at odds with the light source in the render.

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"you are terrifying
and strange and beautiful
something not everyone knows how to love." - Warsan Shire