I would go with a black fedora. Classy. Simple. Elegant.
I'm sorry for your loss mate :(
Damn i have the same problem........buuuuuuuuuuuuuuut my hawk is orange now, so it's a bit more natural.....so i guess I'll just have it to the side or stroked back
Thats a great question. I guess it really just depend upon the person and the people that will be there. I would think down would be in general the most appropiate. A nice hat like the suggested fedora might be good especially with extreme colored hair.
I wonder if you didn't have a hat if temporary black hair spray would not ruin your color, once you washed it out. I've only ever used temp color myself, so I don't know.
Sorry for your loss indeed.