Dying hair with coffee

[Borealis]

This isn't really a hair loss related question, but I want to dye my hair on top as it looks ginger/blonde (in the light) whilst the rest of my hair is brown. It's only ginger when I sweep my hair back but that's how I style it so it really annoys me.

What I want to know is if it has any effect on my hair in terms of exacerbating hair loss etc. etc? I'm sure it doesn't but there's no harm in asking right?

Any help is appreciated