diff --git a/.changeset/itchy-mice-kiss.md b/.changeset/itchy-mice-kiss.md
new file mode 100644
index 0000000000..18390866d9
--- /dev/null
+++ b/.changeset/itchy-mice-kiss.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-techdocs': patch
+---
+
+Add highlight to active navigation item and navigation parents.
diff --git a/plugins/techdocs/src/reader/transformers/styles/rules/layout.ts b/plugins/techdocs/src/reader/transformers/styles/rules/layout.ts
index 2488504dd9..2983bb3a75 100644
--- a/plugins/techdocs/src/reader/transformers/styles/rules/layout.ts
+++ b/plugins/techdocs/src/reader/transformers/styles/rules/layout.ts
@@ -47,6 +47,11 @@ export default ({ theme, sidebar }: RuleOptions) => `
   height: 20px !important;
 }
 
+.md-nav__item--active > .md-nav__link, a.md-nav__link--active {
+  text-decoration: underline;
+  color: var(--md-typeset-a-color);
+}
+
 .md-main__inner {
   margin-top: 0;
 }