diff --git a/src/webapp/components/navigation/guestNavbar/GuestNavbar.tsx b/src/webapp/components/navigation/guestNavbar/GuestNavbar.tsx
index a58aab2b..9fff7186 100644
--- a/src/webapp/components/navigation/guestNavbar/GuestNavbar.tsx
+++ b/src/webapp/components/navigation/guestNavbar/GuestNavbar.tsx
@@ -46,7 +46,7 @@ export default function GuestNavbar() {
               <Button
                 component={Link}
                 href="/login"
-                color="dark"
+                color="var(--mantine-color-dark-filled)"
                 rightSection={<BiRightArrowAlt size={22} />}
               >
                 Log in