which template is the line above each post in ?

I'd like to darken the line between posts in a thread so its a bit more clear when where persons post finishes and anothers reply starts, but i cant find in the templates where the line between posts is defined.
 
It's in message.css
Code:
.messageList .message
{
    @property "message";
    padding-top: 10px;
    padding-bottom: 30px;
    border-top: 1px solid @primaryLighterStill;
    @property "/message";
}
 
I believe that is in message.css:
HTML:
.messageList .message
{
    @property "message";
    padding-top: 10px;
    padding-bottom: 30px;
    border-top: 1px solid @primaryLighterStill;
    @property "/message";
}

Too late :D
 
Top Bottom