diff --git a/web/src/css/custom.css b/web/src/css/custom.css
index aab317ca2b3..6379fd96d11 100755
--- a/web/src/css/custom.css
+++ b/web/src/css/custom.css
@@ -216,7 +216,7 @@
   --ifm-color-gray-800: rgba(224, 235, 247, 0.5);
   --ifm-color-gray-900: rgba(224, 235, 247, 0.45);
   --ifm-color-secondary-darker: #000;
-  --ifm-color-secondary-dark: #1f1f1f;
+  --ifm-color-secondary-dark: #888888;
   --ifm-color-secondary: #2a2a2a;
   --ifm-color-secondary-light: #2f2f2f;
   --ifm-color-secondary-lighter: #313131;