diff --git a/luci-theme-argon/htdocs/luci-static/argon/css/dark.css b/luci-theme-argon/htdocs/luci-static/argon/css/dark.css
index 32c49a7..d62fa44 100644
--- a/luci-theme-argon/htdocs/luci-static/argon/css/dark.css
+++ b/luci-theme-argon/htdocs/luci-static/argon/css/dark.css
@@ -230,7 +230,7 @@ h4 {
   min-width: 170px;
   height: 20px;
   margin: 6px 0;
-  border: thin solid #999;
+  border: thin solid #252526;
   background: transparent;
   border-radius: 0.2rem;
   overflow: hidden;