Disabled-Color
This property allows you to set or retrieve the color of the Check-Box control when it is disabled. Foreground and background color values are combined and therefore RGB colors are not supported. See "Color management" for further details.
 
Example - Define a check-box in screen section with specific enabled and disabled colors
screen section.
...
  03 screen-1-cb-1 Check-Box
     line 22.0
     column 10.0
     size 11.0 cells 
     lines 3.0 cells 
     color 260
     disabled-color 512
     id 10
     title "Sugar with the coffee?"
     .