diff --git a/scss/part/_css-vars.scss b/scss/part/_css-vars.scss
index 57b60f5..a579d70 100644
--- a/scss/part/_css-vars.scss
+++ b/scss/part/_css-vars.scss
@@ -92,6 +92,7 @@
     --background-accent: #{$accent-color};
     --background-floating: #{$background-color};
     --background-mentioned: #{hsla.default($accent-hue, 0.2)};
+    --background-mentioned-hover: #{hsla.default($accent-hue, 0.1)};
     --background-modifier-hover: #{hsla.default($accent-hue, 0.2)};
     --background-modifier-active: #{hsla.default($accent-hue, 0.7)};
     --background-modifier-selected: #{hsla.default($accent-hue, 0.3)};