Title colors in category/tag post list

Hello, I'm using the Catch Base theme in its Dark Color Scheme but I have changed the site's background color into something lighter. Now, all works fine except for one little thing. When I click on a tag or category, the list of posts that appear are shown with their titles/links in a light color, since it's the dark scheme. Since my background color is also light, the problem is that they are barely visible. Same is true for the category/tag name that appears above the list. Is there a way to change these colors? Thanks.