diff --git a/css/common.css b/css/common.css
index ea1e1b7..67095ea 100644
--- a/css/common.css
+++ b/css/common.css
@@ -79,7 +79,7 @@ td {
 
 @keyframes trail-animation {
     from {
-        background-color: rgb(206, 255, 255, 25%);
+        background-color: rgba(206, 255, 255, 25%);
         filter: saturate(50%) brightness(300%);
     }
     to {
@@ -93,7 +93,7 @@ td.trail-animation {
 
 @keyframes cleared-line-animation {
     from {
-        background-color: rgb(206, 255, 255, 40%);
+        background-color: rgba(206, 255, 255, 40%);
         filter: saturate(50%) brightness(300%);
         box-shadow: -200px 0 5px white, 200px 0 5px white;
     }