diff --git a/AirQuality/AirQuality.ino b/AirQuality/AirQuality.ino
index e3887bf..2fdb235 100644
--- a/AirQuality/AirQuality.ino
+++ b/AirQuality/AirQuality.ino
@@ -137,6 +137,7 @@ void setup() {
     }
     .card {
       border: 1px solid #333333;
+      background-color: #333333;
     }
     .card.excellent {
       background-color: #4CAF50;