@mtariq

your Admania WP Theme overwrites all font colors

add this to custom css to keep the original wpForo colors 

#wpforo #wpforo-wrap {
color:#333333 !important;
}
#wpforo #wpforo-wrap a {
color: #3F7796 !important;
}
#wpforo #wpforo-wrap a:visited {
color:#3F7796 !important;
}
#wpforo #wpforo-wrap a:hover {
color:#659FBE !important;
}
#wpforo #wpforo-wrap a:active {
color:#659FBE !important;
}
#wpforo #wpforo-wrap .wpflink {
color:#3F7796 !important;
}
#wpforo #wpforo-wrap .wpflink:hover {
color:#659FBE !important;
}

Dashboard > Forums > Settings > Style (custom css)

Posted by: @mtariq

Tell me asap how to change color of fonts given in picture.

Please don't use the phrase "Tell me asap...". This is a free support community, and people help each other when they find appropriate time for that.