bbPress.org

This worked for me…. Try a hard refresh (CRTL F5/CMD F5 I think), your CSS might be cached.

#bbpress-forums div.bbp-topic-header,
#bbpress-forums div.bbp-reply-header {
background-color: #111111;
}

Use your browsers debug tools also, most browsers tools are pretty awesome, F12 will bring it up or right click an element and select ‘Inspect Element’

Also could you update the codex with the correct edits you found, anyone can edit the codex, just login using your same username and password 🙂

https://codex.bbpress.org/wp-admin/edit.php?post_type=page