diff --git a/apps/client/src/stylesheets/theme-dark.css b/apps/client/src/stylesheets/theme-dark.css
index 3b7a8fcc2..a6aab3118 100644
--- a/apps/client/src/stylesheets/theme-dark.css
+++ b/apps/client/src/stylesheets/theme-dark.css
@@ -70,6 +70,7 @@
 
     --scrollbar-border-color: #666;
     --scrollbar-background-color: #333;
+    --selection-background-color: #3399FF70;
     --tooltip-background-color: #333;
     --link-color: lightskyblue;
 
diff --git a/apps/client/src/stylesheets/theme-light.css b/apps/client/src/stylesheets/theme-light.css
index 70e81885f..b485e8a27 100644
--- a/apps/client/src/stylesheets/theme-light.css
+++ b/apps/client/src/stylesheets/theme-light.css
@@ -74,6 +74,7 @@ html {
 
     --scrollbar-border-color: #ddd;
     --scrollbar-background-color: #ddd;
+    --selection-background-color: #3399FF70;
     --tooltip-background-color: #f8f8f8;
     --link-color: blue;