I don't know what yours is made of, but here's a link with some ideas:
Here's a few for you to look at for inspiration:
Hello! Fireplaces can be painted or often retiled and I find looking around at the visuals on Hometalk, Pinterest or Houzz might offer some inspiration and ideas for the way to refurbish your fireplace.
Heres some ideas that I saved
You might want to read this: http://celebrateanddecorate.com/coastal-fireplace/