diff --git a/client.h b/client.h
index f0e5445..04b8d31 100644
--- a/client.h
+++ b/client.h
@@ -320,6 +320,12 @@ client_set_border_color(Client *c, const float color[static 4])
 		wlr_scene_rect_set_color(c->border[i], color);
 }
 
+static inline void
+client_set_dimmer_state(Client *c, const int dim)
+{
+	wlr_scene_node_set_enabled(&c->dimmer->node, DIMOPT && !c->neverdim && dim);
+}
+
 static inline void
 client_set_fullscreen(Client *c, int fullscreen)
 {
diff --git a/config.def.h b/config.def.h
index 22d2171..e1b2bf0 100644
--- a/config.def.h
+++ b/config.def.h
@@ -10,6 +10,7 @@ static const unsigned int borderpx         = 1;  /* border pixel of windows */
 static const float rootcolor[]             = COLOR(0x222222ff);
 static const float bordercolor[]           = COLOR(0x444444ff);
 static const float focuscolor[]            = COLOR(0x005577ff);
+static const float unfocuseddim[]            = COLOR(0x00000088);
 static const float urgentcolor[]           = COLOR(0xff0000ff);
 /* This conforms to the xdg-protocol. Set the alpha to zero to restore the old behavior */
 static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You can also use glsl colors */
@@ -22,10 +23,11 @@ static int log_level = WLR_ERROR;
 
 /* NOTE: ALWAYS keep a rule declared even if you don't use rules (e.g leave at least one example) */
 static const Rule rules[] = {
-	/* app_id             title       tags mask     isfloating   monitor */
-	/* examples: */
-	{ "Gimp_EXAMPLE",     NULL,       0,            1,           -1 }, /* Start on currently visible tags floating, not tiled */
-	{ "firefox_EXAMPLE",  NULL,       1 << 8,       0,           -1 }, /* Start on ONLY tag "9" */
+	/* app_id     title       tags mask     isfloating   neverdim      monitor */
+	/* examples:
+	{ "Gimp_example",     NULL,       0,            1,           0,            -1 },
+	*/
+	{ "firefox_example",  NULL,       1 << 8,       0,           1,		   -1 },
 };
 
 /* layout(s) */
@@ -140,8 +142,9 @@ static const Key keys[] = {
 	{ MODKEY,                    XKB_KEY_f,          setlayout,      {.v = &layouts[1]} },
 	{ MODKEY,                    XKB_KEY_m,          setlayout,      {.v = &layouts[2]} },
 	{ MODKEY,                    XKB_KEY_space,      setlayout,      {0} },
+	{ MODKEY, 		     XKB_KEY_apostrophe, toggledimming,  {0} },
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space,      togglefloating, {0} },
-	{ MODKEY,                    XKB_KEY_e,         togglefullscreen, {0} },
+	{ MODKEY,                    XKB_KEY_e,          togglefullscreen, {0} },
 	{ MODKEY,                    XKB_KEY_0,          view,           {.ui = ~0} },
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_parenright, tag,            {.ui = ~0} },
 	{ MODKEY,                    XKB_KEY_comma,      focusmon,       {.i = WLR_DIRECTION_LEFT} },
diff --git a/dwl.c b/dwl.c
index 145fd01..6c65860 100644
--- a/dwl.c
+++ b/dwl.c
@@ -110,6 +110,7 @@ typedef struct {
 	Monitor *mon;
 	struct wlr_scene_tree *scene;
 	struct wlr_scene_rect *border[4]; /* top, bottom, left, right */
+	struct wlr_scene_rect *dimmer;
 	struct wlr_scene_tree *scene_surface;
 	struct wl_list link;
 	struct wl_list flink;
@@ -138,7 +139,7 @@ typedef struct {
 #endif
 	unsigned int bw;
 	uint32_t tags;
-	int isfloating, isurgent, isfullscreen;
+	int isfloating, isurgent, isfullscreen, neverdim;
 	uint32_t resize; /* configure serial of a pending resize */
 } Client;
 
@@ -229,6 +230,7 @@ typedef struct {
 	const char *title;
 	uint32_t tags;
 	int isfloating;
+	int neverdim;
 	int monitor;
 } Rule;
 
@@ -334,6 +336,7 @@ static void startdrag(struct wl_listener *listener, void *data);
 static void tag(const Arg *arg);
 static void tagmon(const Arg *arg);
 static void tile(Monitor *m);
+static void toggledimming(const Arg *arg);
 static void togglefloating(const Arg *arg);
 static void togglefullscreen(const Arg *arg);
 static void toggletag(const Arg *arg);
@@ -407,6 +410,7 @@ static struct wlr_output_layout *output_layout;
 static struct wlr_box sgeom;
 static struct wl_list mons;
 static Monitor *selmon;
+static int DIMOPT = 1;
 
 #ifdef XWAYLAND
 static void activatex11(struct wl_listener *listener, void *data);
@@ -465,6 +469,7 @@ applyrules(Client *c)
 		if ((!r->title || strstr(title, r->title))
 				&& (!r->id || strstr(appid, r->id))) {
 			c->isfloating = r->isfloating;
+			c->neverdim = r-> neverdim;
 			newtags |= r->tags;
 			i = 0;
 			wl_list_for_each(m, &mons, link) {
@@ -1346,8 +1351,10 @@ focusclient(Client *c, int lift)
 
 		/* Don't change border color if there is an exclusive focus or we are
 		 * handling a drag operation */
-		if (!exclusive_focus && !seat->drag)
+		if (!exclusive_focus && !seat->drag) {
 			client_set_border_color(c, focuscolor);
+			client_set_dimmer_state(c, 0);
+		}
 	}
 
 	/* Deactivate old client if focus is changing */
@@ -1365,7 +1372,7 @@ focusclient(Client *c, int lift)
 		 * and probably other clients */
 		} else if (old_c && !client_is_unmanaged(old_c) && (!c || !client_wants_focus(c))) {
 			client_set_border_color(old_c, bordercolor);
-
+			client_set_dimmer_state(old_c, 1);
 			client_activate_surface(old, 0);
 		}
 	}
@@ -1638,7 +1645,7 @@ void
 mapnotify(struct wl_listener *listener, void *data)
 {
 	/* Called when the surface is mapped, or ready to display on-screen. */
-	Client *p, *w, *c = wl_container_of(listener, c, map);
+	Client *p, *w, *d, *c = wl_container_of(listener, c, map);
 	Monitor *m;
 	int i;
 
@@ -1670,6 +1677,10 @@ mapnotify(struct wl_listener *listener, void *data)
 		c->border[i]->node.data = c;
 	}
 
+	c->dimmer = wlr_scene_rect_create(c->scene, 0, 0, unfocuseddim);
+	c->dimmer->node.data = c;
+	client_set_dimmer_state(c, 1);
+
 	/* Initialize client geometry with room for border */
 	client_set_tiled(c, WLR_EDGE_TOP | WLR_EDGE_BOTTOM | WLR_EDGE_LEFT | WLR_EDGE_RIGHT);
 	c->geom.width += 2 * c->bw;
@@ -1688,6 +1699,10 @@ mapnotify(struct wl_listener *listener, void *data)
 		setmon(c, p->mon, p->tags);
 	} else {
 		applyrules(c);
+		d = focustop(selmon);
+		if (d) {
+			client_set_dimmer_state(d, 0);
+		}
 	}
 	printstatus();
 
@@ -2141,7 +2156,7 @@ resize(Client *c, struct wlr_box geo, int interact)
 	c->geom = geo;
 	applybounds(c, bbox);
 
-	/* Update scene-graph, including borders */
+	/* Update scene-graph, including borders and dimmer*/
 	wlr_scene_node_set_position(&c->scene->node, c->geom.x, c->geom.y);
 	wlr_scene_node_set_position(&c->scene_surface->node, c->bw, c->bw);
 	wlr_scene_rect_set_size(c->border[0], c->geom.width, c->bw);
@@ -2151,6 +2166,8 @@ resize(Client *c, struct wlr_box geo, int interact)
 	wlr_scene_node_set_position(&c->border[1]->node, 0, c->geom.height - c->bw);
 	wlr_scene_node_set_position(&c->border[2]->node, 0, c->bw);
 	wlr_scene_node_set_position(&c->border[3]->node, c->geom.width - c->bw, c->bw);
+	wlr_scene_rect_set_size(c->dimmer, c->geom.width - 2*c->bw, c-> geom.height - 2*c->bw);
+	wlr_scene_node_set_position(&c->dimmer->node, c->bw, c->bw);
 
 	/* this is a no-op if size hasn't changed */
 	c->resize = client_set_size(c, c->geom.width - 2 * c->bw,
@@ -2666,6 +2683,19 @@ tile(Monitor *m)
 	}
 }
 
+void toggledimming(const Arg *arg)
+{
+   Client *c;
+   DIMOPT ^= 1;
+   wl_list_for_each(c, &clients, link)
+   {
+       client_set_dimmer_state(c, 1);
+   }
+   c = focustop(selmon);
+   if (c)
+	client_set_dimmer_state(c, 0);
+}
+
 void
 togglefloating(const Arg *arg)
 {
