I had the same problem as you a little while ago. I'm 15 with brown eyes and hair too. I experimented with a bunch of different colors but i found that just dark or light chestnut colored eye shadow works really well. Also dark kind of navy blue and plums, and greens work too. What I do is I put dark chestnut shadow on the lid and some light cream colored shadow above it. It looks really good but isn't too drastic.
have fun!
ruby red rose
@>-'-,---