Oxygen Theme: Cannot Change BG of Tags

I need some help forum community!

I cannot change the background of the tags on the main page. When I post a new blog posting, a snipit of the post as well as a picture and a small description come up – if you look to the right hand corner of each, you’ll see gray blocks – if you hover over those gray blocks, you’ll discover my tag links – how can I change that background to either white or another color? I am unsure where that coding is….. Thanks!

http://cest-la-mode.net/quirkysweet/