diff --git a/client.h b/client.h
index 71c7d76..749be99 100644
--- a/client.h
+++ b/client.h
@@ -316,6 +316,12 @@ 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, !c->neverdim && dim);
+}
+
 static inline void
 client_set_fullscreen(Client *c, int fullscreen)
 {
diff --git a/config.def.h b/config.def.h
index db0babc..da75950 100644
--- a/config.def.h
+++ b/config.def.h
@@ -9,6 +9,7 @@ static const int bypass_surface_visibility = 0;  /* 1 means idle inhibitors will
 static const unsigned int borderpx         = 1;  /* border pixel of windows */
 static const float bordercolor[]           = COLOR(0x444444ff);
 static const float focuscolor[]            = COLOR(0x005577ff);
+static const float unfocuseddim[]            = COLOR(0x00000088);
 static const float urgentcolor[]           = COLOR(0xff0000ff);
 /* To conform the xdg-protocol, set the alpha to zero to restore the old behavior */
 static const float fullscreen_bg[]         = {0.1, 0.1, 0.1, 1.0}; /* You can also use glsl colors */
@@ -20,11 +21,11 @@ static const float fullscreen_bg[]         = {0.1, 0.1, 0.1, 1.0}; /* You can al
 static int log_level = WLR_ERROR;
 
 static const Rule rules[] = {
-	/* app_id     title       tags mask     isfloating   monitor */
+	/* app_id     title       tags mask     isfloating   neverdim      monitor */
 	/* examples:
-	{ "Gimp",     NULL,       0,            1,           -1 },
+	{ "Gimp",     NULL,       0,            1,           0,            -1 },
 	*/
-	{ "firefox",  NULL,       1 << 8,       0,           -1 },
+	{ "firefox",  NULL,       1 << 8,       0,           1,		   -1 },
 };
 
 /* layout(s) */
diff --git a/dwl.c b/dwl.c
index 69da91d..8e163be 100644
--- a/dwl.c
+++ b/dwl.c
@@ -103,6 +103,7 @@ 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;
@@ -128,7 +129,7 @@ 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;
 
@@ -214,6 +215,7 @@ typedef struct {
 	const char *title;
 	uint32_t tags;
 	int isfloating;
+	int neverdim;
 	int monitor;
 } Rule;
 
@@ -433,6 +435,7 @@ 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)
@@ -1191,8 +1194,10 @@ 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 */
@@ -1210,7 +1215,7 @@ 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);
 		}
 	}
@@ -1524,6 +1529,10 @@ 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, 0);
+
 	/* Initialize client geometry with room for border */
 	client_set_tiled(c, WLR_EDGE_TOP | WLR_EDGE_BOTTOM | WLR_EDGE_LEFT | WLR_EDGE_RIGHT);
 	client_get_geometry(c, &c->geom);
@@ -1927,7 +1936,7 @@ 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);
@@ -1937,7 +1946,9 @@ 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, c-> geom.height);
+	wlr_scene_node_set_position(&c->dimmer->node, 0, 0);
+	
 	/* this is a no-op if size hasn't changed */
 	c->resize = client_set_size(c, c->geom.width - 2 * c->bw,
 			c->geom.height - 2 * c->bw);