Heading-Color
This property allows you to set or retrieve the color of column headings of a tree-view with Table-View style. Foreground and background color values are combined and therefore RGB colors are not supported. See "Color management" for further details.
 
Example - Define a tree-view with heading color
screen section.
...
  03 screen-1-gr-1 Tree-View
     Table-View
     line 5.7
     column 3.1
     size 34.6 cells 
     lines 15.5 cells 
     id 1
     no-box
     column-headings
     heading-color 300
     .
...