diff --git a/res/themes/light/css/_light.scss b/res/themes/light/css/_light.scss
index dce71b2baf..6d58b77532 100644
--- a/res/themes/light/css/_light.scss
+++ b/res/themes/light/css/_light.scss
@@ -294,7 +294,7 @@ $room-warning-bg-color: $yellow-background;
 $memberstatus-placeholder-color: $roomtile-name-color;
 
 $authpage-bg-color: #2e3649;
-$authpage-modal-bg-color: rgba(255, 255, 255, 0.59);
+$authpage-modal-bg-color: rgba(245, 245, 245, 0.90);
 $authpage-body-bg-color: #ffffff;
 $authpage-focus-bg-color: #dddddd;
 $authpage-lang-color: #4e5054;