((OLIVE!!!!)))) Gahhhhh!!
The question IS..with "OLIVE".................WHAT SHADE of olive? Every time I see this color mentioned, I think of the time I went through my tying desk and counted up 41 shades of "supposed olive"!?!
Anyway, sorry, it's embarrassing to have "material flashbacks" like that, in front of people!
One nice thing about Olive, regardless of it's "shade"........... is it redyes very nicely, to BLACK, a much more, useful color, in the sizes you say you have! (DON'T forget, though, to remove one of the larger hackles for your hat!)