diff --git a/input.c b/input.c
index 294cd522..cfa42406 100644
--- a/input.c
+++ b/input.c
@@ -1481,6 +1481,7 @@ input_handle_sequence_sgr(struct input_ctx *ictx)
 		case 95:
 		case 96:
 		case 97:
+			gc->flags &= ~GRID_FLAG_FG256;
 			gc->fg = m;
 			break;
 		case 100:
@@ -1491,6 +1492,7 @@ input_handle_sequence_sgr(struct input_ctx *ictx)
 		case 105:
 		case 106:
 		case 107:
+			gc->flags &= ~GRID_FLAG_BG256;
 			gc->bg = m;
 			break;
 		}