diff --git a/input.c b/input.c
index 29d0f254..294cd522 100644
--- a/input.c
+++ b/input.c
@@ -1481,8 +1481,7 @@ input_handle_sequence_sgr(struct input_ctx *ictx)
 		case 95:
 		case 96:
 		case 97:
-			gc->flags |= GRID_FLAG_FG256;
-			gc->fg = m - 82;
+			gc->fg = m;
 			break;
 		case 100:
 		case 101:
@@ -1492,8 +1491,7 @@ input_handle_sequence_sgr(struct input_ctx *ictx)
 		case 105:
 		case 106:
 		case 107:
-			gc->flags |= GRID_FLAG_BG256;
-			gc->bg = m - 92;
+			gc->bg = m;
 			break;
 		}
 	}
diff --git a/tty.c b/tty.c
index 32ee197c..c06a4dde 100644
--- a/tty.c
+++ b/tty.c
@@ -1231,6 +1231,7 @@ tty_colours(struct tty *tty, const struct grid_cell *gc, u_char *attr)
 	if (fg == tc->fg && bg == tc->bg &&
 	    ((flags ^ tc->flags) & (GRID_FLAG_FG256|GRID_FLAG_BG256)) == 0)
 		return;
+	log_debug("fg was %hhu, now %hhu", tc->fg, fg);
 
 	/*
 	 * Is either the default colour? This is handled specially because the
@@ -1292,6 +1293,7 @@ tty_colours_fg(struct tty *tty, const struct grid_cell *gc, u_char *attr)
 {
 	struct grid_cell	*tc = &tty->cell;
 	u_char			 fg = gc->fg;
+	char			 s[32];
 
 	/* Is this a 256-colour colour? */
 	if (gc->flags & GRID_FLAG_FG256) {
@@ -1310,6 +1312,18 @@ tty_colours_fg(struct tty *tty, const struct grid_cell *gc, u_char *attr)
 			tty_reset(tty);		/* turn off bold */
 	}
 
+	/* Is this an aixterm bright colour? */
+	if (fg >= 90 && fg <= 97) {
+		/* 16 colour terminals or above only. */
+		if (tty_term_number(tty->term, TTYC_COLORS) >= 16) {
+			xsnprintf(s, sizeof s, "\033[%dm", fg);
+			tty_puts(tty, s);
+			goto save_fg;
+		}
+		fg -= 90;
+		(*attr) |= GRID_ATTR_BRIGHT;
+	}
+
 	/* Otherwise set the foreground colour. */
 	tty_putcode1(tty, TTYC_SETAF, fg);
 
@@ -1325,6 +1339,7 @@ tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
 {
 	struct grid_cell	*tc = &tty->cell;
 	u_char			 bg = gc->bg;
+	char			 s[32];
 
 	/* Is this a 256-colour colour? */
 	if (gc->flags & GRID_FLAG_BG256) {
@@ -1343,6 +1358,18 @@ tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
 			bg &= 7;
 	}
 
+	/* Is this an aixterm bright colour? */
+	if (bg >= 100 && bg <= 107) {
+		/* 16 colour terminals or above only. */
+		if (tty_term_number(tty->term, TTYC_COLORS) >= 16) {
+			xsnprintf(s, sizeof s, "\033[%dm", bg);
+			tty_puts(tty, s);
+			goto save_bg;
+		}
+		bg -= 100;
+		/* no such thing as a bold background */
+	}
+
 	/* Otherwise set the background colour. */
 	tty_putcode1(tty, TTYC_SETAB, bg);