Is his hair blond or brown?: An Infinite Darkness, Death Island, and Resident Evil 6 debate

Snapping between Leon’s earliest appearances and his most recent, including his newest non-remake cameos in the 2021 animated Netflix series Resident Evil: Infinite Darkness and what we’ve so far seen of upcoming animated movie Resident Evil: Death Island, will make you wonder what the hell his hair color is.
Is this an important character detail that will make or break your opinion on Leon’s personality, potential, or how desperately you want to keep him alive? I don’t think so, no. But that doesn’t stop many people from wondering why his seemingly virgin hair (as in, never color-treated, although Leon does seem like the wait-until-marriage type to me) changes from brown to platinum to straw blonde.
Official concept art from the 2012 third-person shooter Resident Evil 6 suggests Leon is rocking lighting-dependent, dirty blond hair, which sometimes appears muddy, like a bruised pear skin, and in other conditions, dust mote pale