[kh99]

My mistake - it's threadlist.css. But it's just as well because I think what you really want to do it edit additional.css, paste that in there, and change it to what you want (and it will override the code in threadbit.css).

I also realized that (assuming it works) this will change the look of unread threads which is the oppposite of what you described. But I think you can look in threadlist.css and find how the color is set you can work it out. (Or maybe someone else will know - or I can try to figure it out tomorrow).