Would it be possible for blonde hair to go black in death? I need the hair colour to change before the hair starts going icky - I still want the hair to be luscious, just a different colour. Plus, if it can, how long after death would this begin to happen? The body is under a house. I don't know if that would affect the condition of the soil... I'm gonna say it's pretty damp so I know that would speed up the decaying process. The body isn't really buried as such, more of in a hollowed out tunnel of mud. But it's still underground. Maybe like 2 feet underground? In England. It's only been a few days since this person died but I can come up with a faster decaying process if needed bc I have fake dead body science I made for my story. And cuz it's England it's p. cold, so umm chemical reactions should happen slower... It's not out in the open so flies and such are less likely to find it I think. I know hair dye exists but uhm I don't think this body has time to go to the salon anymore... I could give some magical explanation like ooohhh evil and all that but ehm I want to give my fiction a somewhat scientific approach, so if people flew in my story I'd be like "boy this is happening bc of *insert a kinda believable scientific thing here that is beyond 'ooh, experiments'*. And jet black as well. Just imagine the transition Willow's hair made in Buffy when she became dark Willow, except more science-y and less witch-y.