Color
This property allows you to set or retrieve the color of the Slider control. Foreground and background color values are combined and therefore RGB colors are not supported. See "Color management" for further details.
 
Example - Define a slide-bar with color property
screen section.
...
  03 screen-1-sl-1 Slider
     line 33.1
     column 12.8
     size 38.2 cells 
     lines 3.0 cells 
     color 135
     id 9
     horizontal
     .