[@robkk Moderator 12 years ago]

this is the css to customize the color , i already put purple in, you can change that to a specific color.

if you are using the bbpress-new ui plugin , i dont know if that will cause a conflict or not.

copy this css anywhere where you can put custom css

jetpack custom css module
custom css plugin
bbpress.css file

HEADER

#bbpress-forums li.bbp-header {
background: purple;
}

i also put the footer css just in case you want to edit that too.

FOOTER

#bbpress-forums li.bbp-header, #bbpress-forums li.bbp-footer {
    background: purple;
    border-top: 1px solid #EEE;
    font-weight: bold;
    padding: 8px;
    text-align: center;
}

Links that might help

Step by step guide to setting up a bbPress forum – part 2

bbPress Styling Crib

Step by step guide to setting up a bbPress forum – part 3

https://codex.bbpress.org/theme-compatibility/

Codex