diff --git a/async-bot.py b/async-bot.py
index ba55d5d..7e50dea 100644
--- a/async-bot.py
+++ b/async-bot.py
@@ -64,7 +64,9 @@ class AsyncBotManager:
             "LA", (int(right - left) + 4, int(bottom - top) + 16), 0
         ) as im:
             draw = ImageDraw.Draw(im)
-            draw.rectangle((0, 0, im.width, im.height), (0, 0))
+            draw.rectangle(
+                (0, 0, im.width, im.height), (255 if negative else 0, 0)
+            )
             draw.text(
                 (left + 2, top + 2),
                 text,