The only changeable colors associated with the TV Folder Control Pane found with Duckbar in X3 are:
<EXEColor Location="C55493" Default="6C6C6C" Description="TRACK | Folder | Data Screen | Line (-)" Color="6C6C6C" />
<EXEColor Location="C55598" Default="6C6C6C" Description="TRACK | Folder | Data Screen | Line (|) center" Color="6C6C6C" />
<EXEColor Location="C554F3" Default="6C6C6C" Description="TRACK | Folder | Data Screen | Line (|) left" Color="6C6C6C" />
<EXEColor Location="C5563D" Default="6C6C6C" Description="TRACK | Folder | Data Screen | Line (|) right" Color="6C6C6C" />
<EXEColor Location="C4F981" Default="6C6C6C" Description="TRACK | Folder | Data Screen | Name Text" Color="6C6C6C" />
<EXEColor Location="C7A979" Default="2C2C2C" Description="TRACK | Folder | Name Screen" Color="2C2C2C" />
Other lines that were found affect all TV tracks so this is very interesting. Unless I'm missing what you're talking about altogether.