diff --git a/config.def.h b/config.def.h
index 6f05dce..3932e83 100644
--- a/config.def.h
+++ b/config.def.h
@@ -127,9 +127,9 @@ static const char *colorname[] = {
  * Default colors (colorname index)
  * foreground, background, cursor, reverse cursor
  */
-unsigned int defaultfg = 7;
-unsigned int defaultbg = 0;
-static unsigned int defaultcs = 256;
+unsigned int defaultfg = 255;
+unsigned int defaultbg = 254;
+unsigned int defaultcs = 256;
 static unsigned int defaultrcs = 257;
 
 /*
diff --git a/st.c b/st.c
index a9338e1..a469512 100644
--- a/st.c
+++ b/st.c
@@ -1842,6 +1842,32 @@ csireset(void)
 	memset(&csiescseq, 0, sizeof(csiescseq));
 }
 
+void
+osc4_color_response(int num)
+{
+	int n;
+	char buf[32];
+	unsigned char r,g,b;
+
+	xgetcolor(num, &r,&g,&b);
+	n = sprintf(buf, "\033]4;%d;rgb:%02x%02x/%02x%02x/%02x%02x\007", num, r, r, g, g, b, b);
+
+	ttywrite(buf, n, 1);
+}
+
+void
+osc_color_response(int index, int num)
+{
+	int n;
+	char buf[32];
+	unsigned char r,g,b;
+
+	xgetcolor(index, &r,&g,&b);
+	n = sprintf(buf, "\033]%d;rgb:%02x%02x/%02x%02x/%02x%02x\007", num, r, r, g, g, b, b);
+
+	ttywrite(buf, n, 1);
+}
+
 void
 strhandle(void)
 {
@@ -1880,6 +1906,45 @@ strhandle(void)
 				}
 			}
 			return;
+		case 11:
+			if (narg < 2)
+				break;
+
+			p = strescseq.args[1];
+
+			if(!strcmp(p, "?"))
+				osc_color_response(defaultbg, 11);
+			else if (xsetcolorname(defaultbg, p))
+				fprintf(stderr, "erresc: invalid background color %d\n", p);
+			else
+				redraw();
+			break;
+		case 12:
+			if (narg < 2)
+				break;
+
+			p = strescseq.args[1];
+
+			if(!strcmp(p, "?"))
+				osc_color_response(defaultcs, 12);
+			else if (xsetcolorname(defaultcs, p))
+				fprintf(stderr, "erresc: invalid cursor color %d\n", p);
+			else
+				redraw();
+			break;
+		case 10:
+			if (narg < 2)
+				break;
+
+			p = strescseq.args[1];
+
+			if(!strcmp(p, "?"))
+				osc_color_response(defaultfg, 10);
+			else if (xsetcolorname(defaultfg, p))
+				fprintf(stderr, "erresc: invalid foreground color %d\n", p);
+			else
+				redraw();
+			break;
 		case 4: /* color set */
 			if (narg < 3)
 				break;
@@ -1887,7 +1952,10 @@ strhandle(void)
 			/* FALLTHROUGH */
 		case 104: /* color reset, here p = NULL */
 			j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
-			if (xsetcolorname(j, p)) {
+
+			if(!strcmp(p, "?"))
+				osc4_color_response(j);
+			else if (xsetcolorname(j, p)) {
 				if (par == 104 && narg <= 1)
 					return; /* color reset without parameter */
 				fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
diff --git a/st.h b/st.h
index fa2eddf..47d76ca 100644
--- a/st.h
+++ b/st.h
@@ -107,6 +107,7 @@ char *getsel(void);
 
 size_t utf8encode(Rune, char *);
 
+void xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b);
 void *xmalloc(size_t);
 void *xrealloc(void *, size_t);
 char *xstrdup(const char *);
@@ -123,3 +124,4 @@ extern char *termname;
 extern unsigned int tabspaces;
 extern unsigned int defaultfg;
 extern unsigned int defaultbg;
+extern unsigned int defaultcs;
diff --git a/x.c b/x.c
index 89786b8..3761fd0 100644
--- a/x.c
+++ b/x.c
@@ -799,6 +799,14 @@ xloadcols(void)
 	loaded = 1;
 }
 
+void
+xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b)
+{
+	*r = dc.col[x].color.red >> 8;
+	*g = dc.col[x].color.green >> 8;
+	*b = dc.col[x].color.blue >> 8;
+}
+
 int
 xsetcolorname(int x, const char *name)
 {