InStyle's September issue they showed 5 lip color trends for fall. They are amazing! The trick is finding the right shade for your skin color. Here's some great examples modeled by some celebs:
The Nude Lip, a continuing trend.
Check out this article from InStyle magazine on how to find your perfect nude shade: http://www.instyle.com/instyle/package/general/photos/0,,20337040_20416247_20835071,00.html
The Bright Pink Lip!
This look can be more playful or more formal depending on how you do the rest of your make-up and also your hair style. This look is obviously more formal with the eyeliner and eye make-up, jewelry, and up-do.
Here's the link to an awesome post by College Fashion on how to achieve a great look with a hot pink lip:
Another continuing trend is the coral lip.
A newer trend is the Red Lip.
This trend is not brand new for fall, but is still red hot.
Check out this article from InStyle to see which shade works best for your skin tone and hair color: http://www.instyle.com/instyle/package/general/photos/0,,20337040_20319008_20703115,00.html
Last we have my personal favorite...the Burgundy Lip!
Here's an article from allure on finding the right shade of burgundy: http://www.allure.com/makeup-looks/2011/how-to-choose-and-wear-the-right-lipstick#slide=5