diff --git a/config.def.h b/config.def.h
index 64e75b8..9a27c14 100644
--- a/config.def.h
+++ b/config.def.h
@@ -58,6 +58,8 @@ static char termname[] = "st-256color";
 
 static unsigned int tabspaces = 8;
 
+/* bg opacity */
+static const int alpha = 0xdd;
 
 /* Terminal colors (16 first used in escape sequence) */
 static const char *colorname[] = {
@@ -85,6 +87,7 @@ static const char *colorname[] = {
 
 	/* more colors can be added after 255 to use with DefaultXX */
 	"#cccccc",
+	"black",
 };
 
 
@@ -93,7 +96,7 @@ static const char *colorname[] = {
  * foreground, background, cursor
  */
 static unsigned int defaultfg = 7;
-static unsigned int defaultbg = 0;
+static unsigned int defaultbg = 257;
 static unsigned int defaultcs = 256;
 
 /*
diff --git a/config.mk b/config.mk
index 67844dc..005b1c6 100644
--- a/config.mk
+++ b/config.mk
@@ -14,7 +14,7 @@ X11LIB = /usr/X11R6/lib
 INCS = -I. -I/usr/include -I${X11INC} \
        `pkg-config --cflags fontconfig` \
        `pkg-config --cflags freetype2`
-LIBS = -L/usr/lib -lc -L${X11LIB} -lm -lrt -lX11 -lutil -lXext -lXft \
+LIBS = -L/usr/lib -lc -L${X11LIB} -lm -lrt -lX11 -lutil -lXext -lXft -lXrender\
        `pkg-config --libs fontconfig`  \
        `pkg-config --libs freetype2`
 
diff --git a/st.c b/st.c
index b89d094..d212134 100644
--- a/st.c
+++ b/st.c
@@ -61,6 +61,7 @@ char *argv0;
 #define XK_ANY_MOD    UINT_MAX
 #define XK_NO_MOD     0
 #define XK_SWITCH_MOD (1<<13)
+#define OPAQUE 0Xff
 
 /* macros */
 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
@@ -77,6 +78,7 @@ char *argv0;
 #define IS_SET(flag) ((term.mode & (flag)) != 0)
 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
+#define USE_ARGB (alpha != OPAQUE && opt_embed == NULL)
 
 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
 #define IS_TRUECOL(x)    (1 << 24 & (x))
@@ -265,6 +267,7 @@ typedef struct {
 	int w, h; /* window width and height */
 	int ch; /* char height */
 	int cw; /* char width  */
+	int depth; /*  bit depth */
 	char state; /* focus, redraw, visible */
 	int cursor; /* cursor style */
 } XWindow;
@@ -2895,8 +2898,7 @@ xresize(int col, int row) {
 	xw.th = MAX(1, row * xw.ch);
 
 	XFreePixmap(xw.dpy, xw.buf);
-	xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
-			DefaultDepth(xw.dpy, xw.scr));
+	xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h, xw.depth);
 	XftDrawChange(xw.draw, xw.buf);
 	xclear(0, 0, xw.w, xw.h);
 }
@@ -2946,6 +2948,14 @@ xloadcols(void) {
 			else
 				die("Could not allocate color %d\n", i);
 		}
+
+	/* set alpha value of bg color */
+	if (USE_ARGB) {
+		dc.col[defaultbg].color.alpha = (0xffff * alpha) / OPAQUE; //0xcccc;
+		dc.col[defaultbg].pixel &= 0x00111111;
+		dc.col[defaultbg].pixel |= alpha << 24; // 0xcc000000;
+	}
+
 	loaded = true;
 }
 
@@ -3189,7 +3199,38 @@ xinit(void) {
 	if(!(xw.dpy = XOpenDisplay(NULL)))
 		die("Can't open display\n");
 	xw.scr = XDefaultScreen(xw.dpy);
-	xw.vis = XDefaultVisual(xw.dpy, xw.scr);
+	xw.depth = (USE_ARGB) ? 32: XDefaultDepth(xw.dpy, xw.scr);
+	if (! USE_ARGB)
+		xw.vis = XDefaultVisual(xw.dpy, xw.scr);
+	else {
+		XVisualInfo *vis;
+		XRenderPictFormat *fmt;
+		int nvi;
+		int i;
+
+		XVisualInfo tpl = {
+			.screen = xw.scr,
+			.depth = 32,
+			.class = TrueColor
+		};
+
+		vis = XGetVisualInfo(xw.dpy, VisualScreenMask | VisualDepthMask | VisualClassMask, &tpl, &nvi);
+		xw.vis = NULL;
+		for(i = 0; i < nvi; i ++) {
+			fmt = XRenderFindVisualFormat(xw.dpy, vis[i].visual);
+			if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
+				xw.vis = vis[i].visual;
+				break;
+			}
+		}
+
+		XFree(vis);
+
+		if (! xw.vis) {
+			fprintf(stderr, "Couldn't find ARGB visual.\n");
+			exit(1);
+		}
+	}
 
 	/* font */
 	if(!FcInit())
@@ -3199,7 +3240,10 @@ xinit(void) {
 	xloadfonts(usedfont, 0);
 
 	/* colors */
-	xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+	if (! USE_ARGB)
+		xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+	else
+		xw.cmap = XCreateColormap(xw.dpy, XRootWindow(xw.dpy, xw.scr), xw.vis, None);
 	xloadcols();
 
 	/* adjust fixed window geometry */
@@ -3222,16 +3266,17 @@ xinit(void) {
 	if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
 		parent = XRootWindow(xw.dpy, xw.scr);
 	xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
-			xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
+			xw.w, xw.h, 0, xw.depth, InputOutput,
 			xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
 			| CWEventMask | CWColormap, &xw.attrs);
 
 	memset(&gcvalues, 0, sizeof(gcvalues));
 	gcvalues.graphics_exposures = False;
-	dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
+	xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h, xw.depth);
+	dc.gc = XCreateGC(xw.dpy,
+			(USE_ARGB)? xw.buf: parent,
+			GCGraphicsExposures,
 			&gcvalues);
-	xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
-			DefaultDepth(xw.dpy, xw.scr));
 	XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
 	XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);