BuddyPress.org

Please read here and give at least some details about the theme you use.

Or better, a valid url to your site. Alternate row color is a theme related question, which can be handled via CSS, but if you don’t tell what theme you use, it’s impossible to guide you more.

Note also that if you use a premium theme, we have no access to it. In this case, you need to ask on the theme support.