diff --git a/config.def.h b/config.def.h
index 2cd740a..ccf3ab8 100644
--- a/config.def.h
+++ b/config.def.h
@@ -73,6 +73,20 @@ static unsigned int cursorthickness = 2;
  */
 static int bellvolume = 0;
 
+/* visual bell duration (in milliseconds) */
+static unsigned int bellduration = 150;
+
+/*
+ * visual bell colors
+ *
+ * Formulas from normal colors to bell colors.
+ * Bell colors are clipped between 0x0000 and 0xffff.
+ */
+#define BELLR(color)	(color.red   * 0.9 + 0xffff * 0.1)
+#define BELLG(color)	(color.green * 0.9 + 0xffff * 0.1)
+#define BELLB(color)	(color.blue  * 0.9 + 0xffff * 0.1)
+#define BELLA(color)	(color.alpha - 0x0500)
+
 /* default TERM value */
 char *termname = "st-256color";
 
diff --git a/x.c b/x.c
index bd23686..30db597 100644
--- a/x.c
+++ b/x.c
@@ -135,6 +135,8 @@ typedef struct {
 /* Drawing Context */
 typedef struct {
 	Color *col;
+	Color *normalcol;
+	Color *bellcol;
 	size_t collen;
 	Font font, bfont, ifont, ibfont;
 	GC gc;
@@ -155,6 +157,8 @@ static void cresize(int, int);
 static void xresize(int, int);
 static void xhints(void);
 static int xloadcolor(int, const char *, Color *);
+static void xnormalcols(void);
+static void xbellcols(void);
 static int xloadfont(Font *, FcPattern *);
 static void xloadfonts(const char *, double);
 static void xunloadfont(Font *);
@@ -220,6 +224,7 @@ static DC dc;
 static XWindow xw;
 static XSelection xsel;
 static TermWindow win;
+struct timespec lastbell;
 
 /* Font Ring Cache */
 enum {
@@ -795,18 +800,33 @@ xloadcols(void)
 {
 	int i;
 	static int loaded;
-	Color *cp;
 
 	if (loaded) {
-		for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
-			XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
+		for (i = 0; i < dc.collen; i++) {
+			XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.normalcol[i]);
+			XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.bellcol[i]);
+		}
 	} else {
 		dc.collen = MAX(LEN(colorname), 256);
-		dc.col = xmalloc(dc.collen * sizeof(Color));
+		dc.normalcol = xmalloc(dc.collen * sizeof(Color));
+		dc.bellcol   = xmalloc(dc.collen * sizeof(Color));
+		dc.col = dc.normalcol;
 	}
 
+	xnormalcols();
+	xbellcols();
+
+	loaded = 1;
+}
+
+void
+xnormalcols(void)
+{
+	int i;
+	static int loaded;
+
 	for (i = 0; i < dc.collen; i++)
-		if (!xloadcolor(i, NULL, &dc.col[i])) {
+		if (!xloadcolor(i, NULL, &dc.normalcol[i])) {
 			if (colorname[i])
 				die("could not allocate color '%s'\n", colorname[i]);
 			else
@@ -815,6 +835,22 @@ xloadcols(void)
 	loaded = 1;
 }
 
+void
+xbellcols(void)
+{
+	int i;
+	XRenderColor bc;
+
+	for (i = 0; i < dc.collen; i++) {
+		bc.red   = MAX(0, MIN(0xffff, BELLR(dc.normalcol[i].color)));
+		bc.green = MAX(0, MIN(0xffff, BELLG(dc.normalcol[i].color)));
+		bc.blue  = MAX(0, MIN(0xffff, BELLB(dc.normalcol[i].color)));
+		bc.alpha = MAX(0, MIN(0xffff, BELLA(dc.normalcol[i].color)));
+		XftColorAllocValue(xw.dpy, xw.vis,
+				xw.cmap, &bc, &dc.bellcol[i]);
+	}
+}
+
 int
 xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b)
 {
@@ -1766,6 +1802,10 @@ xbell(void)
 		xseturgency(1);
 	if (bellvolume)
 		XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
+
+	clock_gettime(CLOCK_MONOTONIC, &lastbell);
+	dc.col = dc.bellcol;
+	redraw();
 }
 
 void
@@ -1925,7 +1965,7 @@ run(void)
 	fd_set rfd;
 	int xfd = XConnectionNumber(xw.dpy), ttyfd, xev, drawing;
 	struct timespec seltv, *tv, now, lastblink, trigger;
-	double timeout;
+	double timeout, bellremain;
 
 	/* Waiting for window mapping */
 	do {
@@ -2014,6 +2054,17 @@ run(void)
 			}
 		}
 
+		/* bell */
+		if (dc.col == dc.bellcol) {
+			bellremain = bellduration - TIMEDIFF(now, lastbell);
+			if (bellremain < 0) {
+				dc.col = dc.normalcol;
+				redraw();
+			} else if (timeout < 0 || bellremain < timeout) {
+				timeout = bellremain;
+			}
+		}
+
 		draw();
 		XFlush(xw.dpy);
 		drawing = 0;