BuddyPress.org

Hello @boki88! Unfortunately it sounds like theme you are using does not have the ability to change those BuddyPress styles without some custom coding. Fortunately, it looks like you have Jetpack enabled and Jetpack has a CSS editor where you can enter custom styles without having to edit code in the theme files.

Go to the edit css page (http://anibusters.com/wp-admin/themes.php?page=editcss) and enter the following style:

.gp-theme #buddypress #activity-stream p { color: black; }