diff --git a/runtime/themes/horizon-dark.toml b/runtime/themes/horizon-dark.toml
index d44cefb56..e51ec09f5 100644
--- a/runtime/themes/horizon-dark.toml
+++ b/runtime/themes/horizon-dark.toml
@@ -33,6 +33,7 @@ tag = "red"
 "ui.selection" = { bg = "selection" }
 "ui.virtual.indent-guide" = { fg = "gray" }
 "ui.virtual.whitespace" = { fg = "light-gray" }
+"ui.virtual.ruler" = { bg ="dark-bg" }
 "ui.statusline" = { bg = "dark-bg", fg = "light-gray" }
 "ui.popup" = { bg = "dark-bg", fg = "orange" }
 "ui.help" = { bg = "dark-bg", fg = "orange" }