diff -u a/config.def.h b/config.def.h
--- a/config.def.h	2014-12-22 23:18:07.000000000 +1300
+++ b/config.def.h	2015-02-12 11:41:47.360229925 +1300
@@ -1,2 +1,3 @@
-#define COLOR1 "black"
-#define COLOR2 "#005577"
+#define COLOR_INIT  "black"
+#define COLOR_INPUT "#005577"
+#define COLOR_EMPTY "#CC3333"
diff -u a/slock.c b/slock.c
--- a/slock.c	2014-12-22 23:18:07.000000000 +1300
+++ b/slock.c	2015-02-12 11:40:19.488018866 +1300
@@ -25,11 +25,17 @@
 
 #include "config.h"
 
+enum {
+	INIT,
+	INPUT,
+	EMPTY
+};
+
 typedef struct {
 	int screen;
 	Window root, win;
 	Pixmap pmap;
-	unsigned long colors[2];
+	unsigned long colors[3];
 } Lock;
 
 static Lock **locks;
@@ -157,12 +163,12 @@
 			}
 			if(llen == 0 && len != 0) {
 				for(screen = 0; screen < nscreens; screen++) {
-					XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[1]);
+					XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[INPUT]);
 					XClearWindow(dpy, locks[screen]->win);
 				}
 			} else if(llen != 0 && len == 0) {
 				for(screen = 0; screen < nscreens; screen++) {
-					XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
+					XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[EMPTY]);
 					XClearWindow(dpy, locks[screen]->win);
 				}
 			}
@@ -179,7 +185,7 @@
 		return;
 
 	XUngrabPointer(dpy, CurrentTime);
-	XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0);
+	XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, sizeof(lock->colors)/sizeof(unsigned long), 0);
 	XFreePixmap(dpy, lock->pmap);
 	XDestroyWindow(dpy, lock->win);
 
@@ -212,10 +218,12 @@
 	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);
-	XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR2, &color, &dummy);
-	lock->colors[1] = color.pixel;
-	XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR1, &color, &dummy);
-	lock->colors[0] = color.pixel;
+	XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR_INIT, &color, &dummy);
+	lock->colors[INIT] = color.pixel;
+	XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR_INPUT, &color, &dummy);
+	lock->colors[INPUT] = color.pixel;
+	XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR_EMPTY, &color, &dummy);
+	lock->colors[EMPTY] = color.pixel;
 	lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
 	invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
 	XDefineCursor(dpy, lock->win, invisible);
@@ -286,7 +294,11 @@
 	int nlocks = 0;
 	for(screen = 0; screen < nscreens; screen++) {
 		if ( (locks[screen] = lockscreen(dpy, screen)) != NULL)
+		{
+			XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[INIT]);
+			XClearWindow(dpy, locks[screen]->win);
 			nlocks++;
+		}
 	}
 	XSync(dpy, False);