ultrix man page for xquerycolor

XQueryColor(3X11)						     MIT X11R4							 XQueryColor(3X11)

Name
       XQueryColor, XQueryColors, XLookupColor - obtain color values

Syntax
       XQueryColor(display, colormap, def_in_out)
	  Display *display;
	  Colormap colormap;
	  XColor *def_in_out;

       XQueryColors(display, colormap, defs_in_out, ncolors)
	  Display *display;
	  Colormap colormap;
	  XColor defs_in_out[];
	  int ncolors;

       Status XLookupColor(display, colormap, color_name, exact_def_return, screen_def_return)
	  Display *display;
	  Colormap colormap;
	  char *color_name;
	  XColor *exact_def_return, *screen_def_return;

Arguments
       colormap  Specifies the colormap.

       color_name
		 Specifies the color name string (for example, red) whose color definition structure you want returned.

       def_in_out
		 Specifies and returns the RGB values for the pixel specified in the structure.

       defs_in_out
		 Specifies and returns an array of color definition structures for the pixel specified in the structure.

       display	 Specifies the connection to the X server.

       exact_def_return
		 Returns the exact RGB values.

       ncolors	 Specifies the number of structures in the color definition array.

       screen_def_return
		 Returns the closest RGB values provided by the hardware.

Description
       The function returns the hardware-specific RGB values for each pixel in the structures and sets the and flags.  The function returns the
       RGB values for each pixel in the structures and sets the and flags.

       and can generate and errors.

       The function looks up the string name of a color with respect to the screen associated with the specified colormap.  It returns both the
       exact color values and the closest values provided by the screen with respect to the visual type of the specified colormap.  You should use
       the ISO Latin-1 encoding; uppercase and lowercase do not matter.  returns nonzero if the name existed in the color database or zero if it
       did not exist.

Diagnostics
       A value for a Colormap argument does not name a defined Colormap.

       Some numeric value falls outside the range of values accepted by the request.
		 Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument
		 defined as a set of alternatives can generate this error.

See Also
       XAllocColor(3X11), XCreateColormap(3X11), XStoreColors(3X11)
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

																 XQueryColor(3X11)