diff --git a/format-draw.c b/format-draw.c
index a42dfe1d..efc6ab1a 100644
--- a/format-draw.c
+++ b/format-draw.c
@@ -719,7 +719,7 @@ format_draw(struct screen_write_ctx *octx, const struct grid_cell *base,
 	int			 focus_start = -1, focus_end = -1;
 	int			 list_state = -1, fill = -1, even;
 	enum style_align	 list_align = STYLE_ALIGN_DEFAULT;
-	struct grid_cell	 gc, current_default;
+	struct grid_cell	 gc, current_default, base_default;
 	struct style		 sy, saved_sy;
 	struct utf8_data	*ud = &sy.gc.data;
 	const char		*cp, *end;
@@ -729,7 +729,9 @@ format_draw(struct screen_write_ctx *octx, const struct grid_cell *base,
 	struct format_ranges	 frs;
 	struct style_range	*sr;
 
+	memcpy(&base_default, base, sizeof base_default);
 	memcpy(&current_default, base, sizeof current_default);
+	base = &base_default;
 	style_set(&sy, &current_default);
 	TAILQ_INIT(&frs);
 	log_debug("%s: %s", __func__, expanded);
@@ -847,6 +849,12 @@ format_draw(struct screen_write_ctx *octx, const struct grid_cell *base,
 		} else if (sy.default_type == STYLE_DEFAULT_POP) {
 			memcpy(&current_default, base, sizeof current_default);
 			sy.default_type = STYLE_DEFAULT_BASE;
+		} else if (sy.default_type == STYLE_DEFAULT_SET) {
+			memcpy(&base_default, &saved_sy.gc,
+			    sizeof base_default);
+			memcpy(&current_default, &saved_sy.gc,
+			    sizeof current_default);
+			sy.default_type = STYLE_DEFAULT_BASE;
 		}
 
 		/* Check the list state. */
diff --git a/screen-redraw.c b/screen-redraw.c
index 0d2acad6..f9bef59e 100644
--- a/screen-redraw.c
+++ b/screen-redraw.c
@@ -121,7 +121,12 @@ screen_redraw_pane_border(struct screen_redraw_ctx *ctx, struct window_pane *wp,
 	u_int		 ex = wp->xoff + wp->sx, ey = wp->yoff + wp->sy;
 	int		 hsplit = 0, vsplit = 0, pane_status = ctx->pane_status;
 	int		 pane_scrollbars = ctx->pane_scrollbars, sb_w = 0;
-	int		 sb_pos = ctx->pane_scrollbars_pos;
+	int		 sb_pos;
+
+	if (pane_scrollbars != 0)
+		sb_pos = ctx->pane_scrollbars_pos;
+	else
+		sb_pos = 0;
 
 	/* Inside pane. */
 	if (px >= wp->xoff && px < ex && py >= wp->yoff && py < ey)
@@ -149,16 +154,24 @@ screen_redraw_pane_border(struct screen_redraw_ctx *ctx, struct window_pane *wp,
 			if (wp->xoff - sb_w == 0 && px == wp->sx + sb_w)
 				if (!hsplit || (hsplit && py <= wp->sy / 2))
 					return (SCREEN_REDRAW_BORDER_RIGHT);
-			if (wp->xoff - sb_w != 0 && px == wp->xoff - sb_w - 1)
-				if (!hsplit || (hsplit && py > wp->sy / 2))
+			if (wp->xoff - sb_w != 0) {
+				if (px == wp->xoff - sb_w - 1 &&
+				    (!hsplit || (hsplit && py > wp->sy / 2)))
 					return (SCREEN_REDRAW_BORDER_LEFT);
-		} else { /* sb_pos == PANE_SCROLLBARS_RIGHT */
+				if (px == wp->xoff + wp->sx + sb_w - 1)
+					return (SCREEN_REDRAW_BORDER_RIGHT);
+			}
+		} else { /* sb_pos == PANE_SCROLLBARS_RIGHT or disabled*/
 			if (wp->xoff == 0 && px == wp->sx + sb_w)
 				if (!hsplit || (hsplit && py <= wp->sy / 2))
 					return (SCREEN_REDRAW_BORDER_RIGHT);
-			if (wp->xoff != 0 && px == wp->xoff - 1)
-				if (!hsplit || (hsplit && py > wp->sy / 2))
+			if (wp->xoff != 0) {
+				if (px == wp->xoff - 1 &&
+				    (!hsplit || (hsplit && py > wp->sy / 2)))
 					return (SCREEN_REDRAW_BORDER_LEFT);
+				if (px == wp->xoff + wp->sx + sb_w)
+					return (SCREEN_REDRAW_BORDER_RIGHT);
+			}
 		}
 	}
 
diff --git a/style.c b/style.c
index c9e5b15e..4e4f6fcc 100644
--- a/style.c
+++ b/style.c
@@ -98,6 +98,8 @@ style_parse(struct style *sy, const struct grid_cell *base, const char *in)
 			sy->default_type = STYLE_DEFAULT_PUSH;
 		else if (strcasecmp(tmp, "pop-default") == 0)
 			sy->default_type = STYLE_DEFAULT_POP;
+		else if (strcasecmp(tmp, "set-default") == 0)
+			sy->default_type = STYLE_DEFAULT_SET;
 		else if (strcasecmp(tmp, "nolist") == 0)
 			sy->list = STYLE_LIST_OFF;
 		else if (strncasecmp(tmp, "list=", 5) == 0) {
@@ -310,6 +312,8 @@ style_tostring(struct style *sy)
 			tmp = "push-default";
 		else if (sy->default_type == STYLE_DEFAULT_POP)
 			tmp = "pop-default";
+		else if (sy->default_type == STYLE_DEFAULT_SET)
+			tmp = "set-default";
 		off += xsnprintf(s + off, sizeof s - off, "%s%s", comma, tmp);
 		comma = ",";
 	}
diff --git a/tmux.1 b/tmux.1
index da3225bc..0c7c3e68 100644
--- a/tmux.1
+++ b/tmux.1
@@ -6359,6 +6359,10 @@ will be available in the
 format variable.
 .Ql X
 must be at most 15 bytes in length.
+.It Ic set-default
+Set the current colours and attributes as the default, overwriting any previous
+default.
+The previous default cannot be restored.
 .El
 .Pp
 Examples are:
diff --git a/tmux.h b/tmux.h
index 55334e93..159148ba 100644
--- a/tmux.h
+++ b/tmux.h
@@ -890,7 +890,8 @@ TAILQ_HEAD(style_ranges, style_range);
 enum style_default_type {
 	STYLE_DEFAULT_BASE,
 	STYLE_DEFAULT_PUSH,
-	STYLE_DEFAULT_POP
+	STYLE_DEFAULT_POP,
+	STYLE_DEFAULT_SET
 };
 
 /* Style option. */