Predefined Colors for Windows Systems
In addition to the colors listed in the rgb.txt file, you may use any of the predefined Windows system colors listed in Table E-2: Predefined Window System Colors as your widget colors.
 
Table E-2: Predefined Window System Colors  
Windows System Colors
Corresponding Widget Color
COLOR_3DDKSHADOW
Dark shadow for 3D display elements
COLOR_3DFACE,
COLOR_BTNFACE
Face color for 3D display elements
COLOR_3DHILIGHT,
COLOR_3DHIGHLIGHT,
COLOR_BTNHILIGHT,
COLOR_BTNHIGHLIGHT
Highlight color for 3D display elements (for edges facing the light source)
COLOR_3DLIGHT
Light color for 3D display elements (for edges facing the light source)
COLOR_3DSHADOW,
COLOR_BTNSHADOW
Shadow color for 3D display elements (for edges facing away from the light source)
COLOR_ACTIVEBORDER
Active window border
COLOR_ACTIVECAPTION
Active window caption
COLOR_APPWORKSPACE
Background color of multiple document interface (MDI) applications
COLOR_BACKGROUND,
COLOR_DESKTOP
Desktop
COLOR_BTNTEXT
Text on push buttons
COLOR_CAPTIONTEXT
Text in caption, size box, and scroll bar arrow box
COLOR_GRAYTEXT
Grayed (disabled) text; this color is set to 0 if the current display driver does not support a solid gray color.
COLOR_HIGHLIGHT
Items selected in a control
COLOR_HIGHLIGHTTEXT
Text of selected items in a control
COLOR_INACTIVEBORDER
Inactive window border
COLOR_INACTIVECAPTION
Inactive window caption
COLOR_INFOBK
Color of text in an inactive caption
COLOR_INFOTEXT
Text color for tool tip controls
COLOR_MENU
Menu background
COLOR_MENUTEXT
Text in menus
COLOR_SCROLLBAR
Scroll bar gray area
COLOR_WINDOW
Window background
COLOR_WINDOWFRAME
Window frame
COLOR_WINDOWTEXT
Text in windows
Specifying XtDefaultForeground or XtDefaultBackground causes the widget to use the appropriate Windows system colors.