Hi, I tried searching but I don't know what that horizontal pane is called that consists of the sort field columns (ie, Name, Size, Type, Modified...).
I'm trying to make a nice grayish color scheme but can't seem to find the setting for coloring that pane. Just spent an hour looking and got everything else toned down, but can't seem to find that one!
A nudge to the right menu would be most appreciated!
Going to bed now so sorry about the short reply, but go to this page and search "You may like the idea of colors in your file display"
If I understood your question, I think the answer is in that section.
Assuming you mean the column header (shown below), the look of that comes from your Windows visual style. Opus does not paint it itself, Windows paints it. It can only be changed by switching visual styles.