diff --git a/frontend/src/index.css b/frontend/src/index.css
index 33ff3f9..981e506 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -5,9 +5,9 @@
 
 /* OverlayScrollbars 페이지(main) 스크롤바 테마 — primary green */
 .os-theme-fromis {
-  --os-handle-bg: rgba(84, 131, 96, 0.5);
-  --os-handle-bg-hover: rgba(84, 131, 96, 0.78);
-  --os-handle-bg-active: rgba(69, 110, 80, 0.9);
+  --os-handle-bg: #548360;
+  --os-handle-bg-hover: #456e50;
+  --os-handle-bg-active: #456e50;
   --os-size: 11px;
   --os-handle-border-radius: 9999px;
   --os-padding-perpendicular: 2px;