I haven't set up a style for google reader (yet) but Stylish extension for Firefox does a good job letting me customize sites. I don't use it on every site, but places I view regularly I tweak.
I have a style for news.yc http://news.ycombinator.com/item?id=3085416
http://userstyles.org/styles/55550/google-reader-g-edition-m...
.read > .card { border: 1px solid #f357a1 !important; }
Adds a pinkish border around the cards of read items.
I haven't set up a style for google reader (yet) but Stylish extension for Firefox does a good job letting me customize sites. I don't use it on every site, but places I view regularly I tweak.
I have a style for news.yc http://news.ycombinator.com/item?id=3085416