A patch which adds COLOR3 to slock (http://tools.suckless.org/slock/)

slock-add-color3.diff

diff --git a/config.mk b/config.mk
index 8cc3f68..941e265 100644
--- a/config.mk
+++ b/config.mk
@@ -14,7 +14,7 @@ INCS = -I. -I/usr/include -I${X11INC}
 LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext
 
 # flags
-CPPFLAGS = -DVERSION=\"${VERSION}\" -DHAVE_SHADOW_H -DCOLOR1=\"black\" -DCOLOR2=\"\#005577\"
+CPPFLAGS = -DVERSION=\"${VERSION}\" -DHAVE_SHADOW_H -DCOLOR1=\"black\" -DCOLOR2=\"\#005577\" -DCOLOR3=\"\#333333\"
 CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
 LDFLAGS = -s ${LIBS}
 
diff --git a/slock.c b/slock.c
index 399386b..9af86b4 100644
--- a/slock.c
+++ b/slock.c
@@ -27,7 +27,7 @@ typedef struct {
 	int screen;
 	Window root, win;
 	Pixmap pmap;
-	unsigned long colors[2];
+	unsigned long colors[3];
 } Lock;
 
 static Lock **locks;
@@ -179,7 +179,7 @@ unlockscreen(Display *dpy, Lock *lock) {
 		return;
 
 	XUngrabPointer(dpy, CurrentTime);
-	XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0);
+	XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 3, 0);
 	XFreePixmap(dpy, lock->pmap);
 	XDestroyWindow(dpy, lock->win);
 
@@ -208,7 +208,9 @@ lockscreen(Display *dpy, int screen) {
 
 	/* init */
 	wa.override_redirect = 1;
-	wa.background_pixel = BlackPixel(dpy, lock->screen);
+	XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR3, &color, &dummy);
+	lock->colors[3] = color.pixel;
+	wa.background_pixel = lock->colors[3];
 	lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
 			0, DefaultDepth(dpy, lock->screen), CopyFromParent,
 			DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);