ColBorder has been moved to the enum with ColFg and ColBg.

drw.h

@@ -12,7 +12,7 @@ typedef struct Fnt {
 	struct Fnt *next;
 } Fnt;
 
-enum { ColFg, ColBg }; /* Clr scheme index */
+enum { ColFg, ColBg, ColBorder }; /* Clr scheme index */
 typedef XftColor Clr;
 
 typedef struct {

dwm.c

@@ -56,7 +56,6 @@
 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
 #define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
-#define ColBorder               2
 
 /* enums */
 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */