diff --git a/runtime/themes/mellow.toml b/runtime/themes/mellow.toml
index 8ab66622f..db237f977 100644
--- a/runtime/themes/mellow.toml
+++ b/runtime/themes/mellow.toml
@@ -79,6 +79,7 @@
 "ui.text.focus" = { fg = "fg" }
 
 "ui.virtual" = { fg = "gray02" }
+"ui.virtual.ruler" = { bg ="gray02" }
 "ui.virtual.indent-guide" = { fg = "gray02" }
 "ui.virtual.inlay-hint" = { fg = "gray04" }