I really like this theme, congratulations.
I'd say that the headings being blue clash with the overwhelming otherwise green look.
Have a play, but perhaps either some dark green, or other complimentary colour (dark grey? brown? A rusty dark orange?) might be better.
I'm an advocate for blue links, so I'd attempt to keep those in. Maybe the links need to be a bit dark so they're not as washed out? :P