diff --git a/css/includes/_palette_dark.scss b/css/includes/_palette_dark.scss
index 3046081c876..4ec97c96b66 100644
--- a/css/includes/_palette_dark.scss
+++ b/css/includes/_palette_dark.scss
@@ -49,7 +49,6 @@
     --tblr-gray-800: color-mix(in srgb, var(--tblr-dark), var(--tblr-light) 84%);
     --tblr-gray-900: var(--tblr-light);
     --tblr-gray-50: var(--tblr-gray-300);
-    --tblr-bg-surface-dark: color-mix(in srgb, var(--tblr-bg-surface), var(--tblr-light) 98.5%);
     --glpi-tabs-active-bg: color-mix(in srgb, var(--tblr-bg-surface), white 10%);
     --glpi-tabs-border-color: transparent;
     --glpi-scrollbar-thumb-color: color-mix(in srgb, var(--tblr-secondary), transparent 75%);