File xcolors-04oct91-xorg7_rgbtxt.patch of Package xcolors
--- xcolors.c
+++ xcolors.c
@@ -29,7 +29,7 @@
#include <math.h> /* for sqrt() */
#ifndef RGB_TXT
-#define RGB_TXT "/usr/X11R6/lib/X11/rgb.txt"
+#define RGB_TXT "/usr/share/X11/rgb.txt"
#endif
String fallback_resources[] = {